RAY: Once the car starts, the battery's job is done. Mini 35 Amp 12-V Negative Ground Alternator with Pulley …ignitions* 4-1/2" housing diameter* 2-3/4" pulley outside diameter* 1/2" belt width* For negative ground systems onlyNote: (Simple 1 wire alternator hook up) Run a wire from the alternator through the ammeter to positive side of battery. Re: Alternator open circuit over voltage. Plus, your alternator includes free ground shipping. It demonstrates that the alternator cannot keep a charge when the car is running. Most use two terminals: some only use one and, best of all, the wires simply plug into terminal sockets on the alternator. You could just connect to big terminal on alternator or bring it up to the + of battery (my preference). Henry on the restoration and maintenance of air-cooled Volkswagens. The fact that is happens when it cool and damp, could mean you have the heater on with the fan, maybe the window defroster, stereo, etc That places a load on the electrical system and battery, which the alternator is happy to fill I would check for a bad ground at the speaker first. Alternator Models and Output Performance at Various RPMs - Top. new battery,new alternator aftermarket. 27-inch 4 gauge battery to fuse box wire. Manufacturers typically ground alternators to the frames of automobiles. Your Negative Battery Cable is connected directly to ground on your cars frame. Quite simply, there is a bunch of misinformation out there in regards to charging systems—more than any other topic I can think of in this book. was driving down the road and every warning light possible started flashing and car died. housing to the engine block. Then start the engine and check for increased voltage readings as shown above. I heard the wire powers the alternator and makes the battery get charge. (Most older cars the dash warning light was directly connected to the voltage regulator and the regulator were connected directly to the alternator. While the system voltage is below the setting of the voltage regulator, the regulator turns ON the field current. Electrical ground points: Check the ground circuits between the battery and engine and also from the vehicle body to the frame for high resistance. I have the house battery bank (2 group 27 12v in parallel, 110 ah each) located about equidistant between the wheels, under the floor with a lift out panel for maintenance. to Engine terminal of battery switch 3. If a ground wire is exposed, connect it to a convenient spot on the chassis or engine block. Connect the black ground wire to the alternator. to Starter 2. But the battery is at the opposite side of the car from the “main power distribution hub. The Lucas Rectifier assumes positive ground, the DC (+) output fed directly to the chassis through the mounting bolt. If a ground wire is exposed, connect it to a convenient spot on the chassis or engine block. 1V around 2000RPM. Wiring from the alternator directly to the battery will charge the battery, but that could be done with a 37 amp alternator too. Yes, I typically recommend charging at a relatively low current, such as 2 amps. Connect the alternator power output terminal to the battery, and connect the signal terminal to the ignition warning light. I have replaced the alternator voltage regulator, and confirmed a healthy >14 volt operation of the alternator by bench testing. Had the generator been DC, you could connect them in series to get 48 V but a 48 V battery can be only charged at a voltage slightly above 48 V, say 52 V. The terminal is present on 1 wire regulators. If the alternator is not charging the battery, the slowly reducing battery voltage will be seen at the alternator output post as well as the battery post. positive battery ground Tractor Engine Repair Rebuild Tractor Engine Repair Rebuild I went to start and Ford 900 that I was thinking about buying and I noticed it had a positive grounded battery. In 1957, all American car manufacturers standardized their electrical systems at 12 volt, negative ground to accommodate aftermarket manufacturers, and to take advantage of the new solid-state electronics, which did not work well in positive-ground systems. Winches have their ground return directly to the battery, and with the high current draw of the winch, it far exceeds the current capacity of the alternator, and any recharge rate. This is why it is best to run the ground directly from the rear of the alternator to the battery. Alternator:. Alternator charge circuit comes through 10g wire at alternator to starter lug at starter to battery through 2/0 (large) cable directly to + battery terminal,4 connections. The battery serves as a giant "electrical flywheel" to smooth voltage from the alternator. edit: the battery also need to be secured by 2- 3/8" minimum bolts(or allthread) through the framerail. There is also a faint possibility that the internal regulator on the alternator has blown - unusual but it can happen. Then, have a strap going off that wire to the in-dash player, then continue the wire to the amplifier in the rear. Technical Information K20 Swap Grounds Grounds. Most people will just swap out the generator for a typical 12 volt AC Delco 10-SI alternator. This will keep the fan from drawing any current from the battery while the ignition is off. fourth, to hook an ammeter up, find where the + large cable from battery goes and then find the other wires going to same terminal (usually solenoid). You need exactly the same grounds as the RSX. The battery grounds in two locations; at the driver shock tower and at the starter. ) Checking for voltage drop Start with a good ground, which would be the negative battery post. I did so and the lights went away. Includes self tapping hex head bolt with external star lock washer. Dead battery. This is a normal occurrence because the battery is now being charged. This allows any device from your radio to lights or engine to complete the path back to the battery negative terminal simply by being mounted to. Replace broken or slipping belts and retest. If the test light goes out, the alternator is causing the drain. Follow me on this one. I have a 2003 Ford Focus Se sedan with 97,000 miles and a 4cyl engine & automatic transmission. In modern cars, the alternator is actually disabled when the battery is full and the electronics will run from the battery for a while, reducing load on the engine and improving fuel economy. i would suggest 8AWG from a welding supplier. Battery manager is an electronic device incorporated in the battery circuit to protect the battery and/or cells from events such as over-charge, over-discharge, over-current, over-temperature and cell imbalance. ” If the battery is less than 50 percent charged, you’ll have to charge it up to 100 percent with a battery charger before testing the alternator. In modern cars, the alternator is actually disabled when the battery is full and the electronics will run from the battery for a while, reducing load on the engine and improving fuel economy. To satisfy the alternator's requirement for negative ground, the vehicle electrical system needs to be converted from positive to negative ground, also a simple task. If you have an internal regulated alternator, and the ground connection is bad, the alternator will not have an accurate voltage to regulate to. If you work on the main output lead of the alternator be sure to remove the ground lead to the battery first. I use the second method and have had zero issues with this arrangement even with a lot of accessories. How To Make A Dual Battery Isolator Setup For Cheap August 11 By coolfeet 4 Comments Many off-road campers and RVers require a dual battery isolator setup to run their power hungry gadgets like GPS, laptops, smart phones, refrigerators, televisions. With meter verify that less than. I’ve given many lectures on this topic over the years, and I’ve found that it is a topic of unbelievable controversy. An insufficient ground wire can cause as much damage to the alternator as insufficient wiring between the alternator and the battery. Don't forget to include any bypass, or filter capacitor. Unplug the factory plug from the alternator, and unbolt/remove the bottom swivel alternator bolt and ground eyelet. Insulate and secure to prevent. A battery rated for marine use is designed to maintain at least an 80% SoC (state of discharge) after sitting uncharged for 12 months or more. isolated ground terminal so a ground wire will need to be added from alternator ground to battery ground. The XSvolt alternator will then automatical ly maximize. Adding an alternator of substantionaly larger amperage then the wiring in your car was designed for can lead to hot wires and fire. The battery is brand new, just bought it a week ago (standard procedure for me when buying a new car) and after a week of the starter cranking over slower and slower, it is now obvious that the alternator is not charging the battery back up. Upon cranking, it was showing full 14. If the interior and dashboard lights come on brightly but slowly start to fade, then it indicates a problem whit the alternator. Remove old alternator. There's a tab on the backside of this bolt with a nut welded to it. Yea, another vote for alt chassis to battery negative. Not the circuit. This circuit will keep a 6 volt NiCAD battery (b1) topped off with a few hours of sun every day. A trick to rejuvenate a car battery - Duration: 10:43. In so much it was throwing sparks at times while being tested. Is this possible? I have heard both sides. Quick and dirty, large red wire is to the battery, the other two are to turn on the field, hooking up a switch to them will allow you to turn the alternator on and off by hand I can't help you with the actual wiring, but it's a handy emergency fix. The green AC ground will not satisfy the ABYC case ground requirement on an AC/DC battery charger. The Alternator was charging last night. The biggest wire goes directly to the only large bolt on terminal--the hot battery term. I had the old alternator tested on it was bad. The ground cable from the alternator should also be a minimum of 2 gauge cable and should be bolted directly to a chassis ground or the negative side of the battery. The DCDC does draw some current when the aux battery is dead flat but at other times it draws little. Minimum wire size should be 6GA. P1246- Alternator Load Input Failed- For some reason, the PCM is not receiving the load frequency signal from the alternator. So, this ground is indirectly grounded to the engine via the alternator bracket. second way to do it is hook 10 gage directly to battery, then fuse near battery, 10 gauge back to the 7 pin. If vehicle has an ignition wire, it does not need to be connected to the alternator. Make sure that the battery is fully charged. The Lucas Rectifier assumes positive ground, the DC (+) output fed directly to the chassis through the mounting bolt. Including the ground with a remote battery. So I finally narrowed down my short to the hot wire that goes from the alternator to the starter. What should my system voltage be? On a 12 volt system the high cutout voltage should be between 14. I have a 6 volt positive ground alternator in stock. when i removed the alternator, the pully does have a little drag on it when turned by hand, not a clean spin, sorta like it catches up a bit in some places when being spun,, so i first thought that might be a sign that it is. Check to make sure the belts are tight and not slipping. The safest way to incorporate alternator charging is with a second engine alternator. How To Wire Alternator Directly To Battery: Batteries lose charge over time and replacing them can be expensive. At first my alternator had an 8 gauge wire going straight to the battery and no ground wire (thought the alt grounded itself). The starter lead is already solidly connected to battery + with a 4awg or larger cable, so its a shorter trip to just go to the starter rather than run a seperate lead all the way to the battery. I looked up the wiring diagram and was able to locate and remove the wire, except there seems to be a problem: it was just a 10 ga wire running from the alternator to the starter, and about half way in between was another 10 ga wire spliced into it running to a junction block on the firewall above. So when I hook up the 12v. 24 -Volt Alternator Installation & Operation Manual Introduction Thank you for choosing a Balmar high-output alternator. If a ground wire is exposed, connect it to a convenient spot on the chassis or engine block. Howto install a Sterling ‘alternator to battery charger’ on a Yanmar Y3M20 sehret April 19, 2016 5 Electrical system , equipment , Howto , planning I want share some knowledge about installing a ‚Sterling Power‘ alternator to battery charger. This alternator is uniquely designed and engineered to provide the finest performance and durability for your vessel. Conversion to Negative Earth/Ground. Trunk mounted batteries require heavier gauge battery cables. Since we've seen that alternator charging rarely goes over 100 amps, fuse size is less of a concern as it's mainly just in place for catastrophic failures (if insulation breaks down and shorts to ground). For maximum performance route 2 gauge battery cable or larger from the alternator battery post directly to the battery positive stud. 5 E90 Voltage Supply & Bus Systems Battery Connections Located on the right side of the luggage compartment is the battery, from here power is supplied to the starter, alternator, engine electronics and to the junction box by way of. Do I create a new ground by attaching a 0 gauge wire from alternator to the negative terminal of the battery? Or look for something else. The appropriate USA engine block ID numbers for these years are as follows: 18G and 18GA (3 main bearing) and 18GB (5 main bearing). 5) when runing. Your Ford Focus alternator steps in to perform this task. (Most older cars the dash warning light was directly connected to the voltage regulator and the regulator were connected directly to the alternator. Run a piece of cable sized the same as the + on the amp directly to the - battery post. Ground either field terminal, and hook the remaining one to a known good battery source, like the start relay stud. 5v as it charges the battery. Batteries designed for marine applications are not the battery of choice for any mobile installation, the fact they have screw terminals notwithstanding. Make sure all connections, including battery ground cable, are clean and tight. • Surface Charge: Higher than normal battery voltage occurring when the battery is disconnected from battery charger. If the alternator was not present to provide that power it would come directly from the cars battery. I've done that many times over years, I run extra ground from alt to battery and extra ground from battery to chassis. when i removed the alternator, the pully does have a little drag on it when turned by hand, not a clean spin, sorta like it catches up a bit in some places when being spun,, so i first thought that might be a sign that it is. With the motor running it might jump to 14. After you remove the battery charger, turn on the headlights (engine off) for four minutes. Using the alternator in either instance requires no extra effort on the part of the end user. Put a voltmeter on the battery. Includes self tapping hex head bolt with external star lock washer. So I am extremely confused at this point. battery with half energy density at 40oC will have a voltage of about 13. I like running a thick #4 or larger from the negative battery terminal through the firewall and have a clamp to ground it there. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. This alternator is uniquely designed and engineered to provide the finest performance and durability for your vessel. No problem, new alternator. Many times when a vehicle has been repaired, the ground point(s) are disturbed or not re-secured properly. Running that wire will not cause any issues, actually the main battery fuse in the fuse box directly connects to the wire in the fuse box under the hood, wich then goes straight to the battery so no difference if you add in a fuse. That is the terminal that needs to have battery positive voltage applied to it, via a 3 amp fuse, in order to energize the alternator and begin charging. the fusebox is connected directly to the battery using a few feet of wire. You can liken the effect to connecting strings of lights to a portable generator. 5 volts or more, remove the second battery and continue charging until fully charged. When you change out a bad battery, be sure to obtain a replacement that has the cold cranking amps that your auto needs. If a loose bolt breaks the connection, the alternator's voltage regulator can overcharge the battery and destroy the entire electrical system. Then make sure that the cable from the battery to the starter switch and on to the starter is also good. Obviously, this approach bypasses the entire ground side of the field, including the ECM. For maximum battery life the alternator charge should be sized to not exceed the recommended charge current. If you unplug the alternator connector you'll see the light go out so the alternator definitely sets the light. It demonstrates that the alternator cannot keep a charge when the car is running. but its a easy and fast way to check for the alternator, car should run without a battery if the alternator is fine. 2 gauge negative battery cable with 6 gauge chassis ground. Figure 2 also shows that the battery and alternator have different thermal sensitivities. The relay is switched by the charge warning light wire or similar. Re: 1998 Jeep Cherokee Not Charging Battery found problem was a cracked ring connector on ground from alternator to engine block. Used only for those that require the stock connector to fit snugly. Use caution, however, as a dying battery can only receive a charge for so long and may go completely dead at a later point despite the best efforts of the alternator. Either way it will be a good grounding point. Older vehicles had separate voltage regulators mounted on firewalls or the side of the engine compartment, wired in between from the alternator to the battery. Do I create a new ground by attaching a 0 gauge wire from alternator to the negative terminal of the battery? Or look for something else. This is important as the alternator is designed for negative ground and the alternator regulator may be damaged if it is wired as positive ground. The sealed battery, which did not require refilling, was invented in 1971. Looks like the field coil of the alternator isn't getting power. Before you start, I will assume your battery is a bit low. An internal regulator is contained within the alternator housing. The charging system supplies electrical power for the ignition system, the lights, the radio, etc. Quite simply, there is a bunch of misinformation out there in regards to charging systems—more than any other topic I can think of in this book. yes, you can ground 12v and 24v to the same ground. during cranking the voltmeter displays a reading of 878 mV technician A says that this reading indicates that the positive battery cable has to high. Check your main ground cable where it fastens to the chassis of the car, not at the battery. cable to where it connects to the engine or the frame and see if you can improve that,. Be sure to remove the paint from under this connection to ensure good contact with the bare metal. In a positive ground system,the vehicle's steel frame or chassis is directly connected to the positive side of the battery via the positive battery cable. The battery and alternator are connected directly to the starter, so make sure the connections are clean and tight. Since we've seen that alternator charging rarely goes over 100 amps, fuse size is less of a concern as it's mainly just in place for catastrophic failures (if insulation breaks down and shorts to ground). Buy battery cable, by the foot, for your next wiring project. Most of the antique tractor generators are polarity swappable by repolarizing One of the few advantages of a generator over an alternator. It may be more drained if the vehicle has been sitting a long time, the lights were on or other accessories used to deplete the battery. Okay so I figured it must have been the isolator. It is not really an issue related to the dimming anyway as the amp is wired to to the battery direct. The 2011 Dodge Durango has 19 problems reported for alternator stopped working. If the output voltage is lower than that of the battery, the rectifier, because of its "one-way" diodes, will not pass current from the battery to the alternator. The alternator came on the scene soon after, and the old DC generator began a slow. It demonstrates that the alternator cannot keep a charge when the car is running. This is why it is best to run the ground directly from the rear of the alternator to the battery. If the engine ground wire is damaged or the contact point of the alternator and the bracket is rusted, the ground circuit might be disrupted causing various charging problems. • No heat sink or cooling required. the battery red light will stay on until the other side of the light "sees" alternator output voltage = > battery voltage. Therefore, if you need to replace a Toyota Alternator on a Camry, a Yaris or any other Toyota car, look no further. The system uses a battery, located aft of the rear cabin wall, as the source of electrical energy and a belt-driven 60-amp alternator to maintain the battery's state of charge. isolated ground terminal so a ground wire will need to be added from alternator ground to battery ground. The alternator keeps the battery charged. Using the alternator in either instance requires no extra effort on the part of the end user. Batteries leak acidic fumes around the post. additional problem was a faulty NEW alternator, it had a factory defect on rectifier. Then the alternator to block ground lead. The ground wire goes to the battery. This will keep the fan from drawing any current from the battery while the ignition is off. Reason for this high voltage 1. Bad grounding can also prevent the alternator from properly charging the battery. except sometimes thr battery light will go off and will charge but. That way, you don't have to consider the gauge of the van's wires in the circuit. Vehicles older than a 1960 model may require all of the connections of the alternator, except ground, to be connected to positive and negative terminals of an external voltage regulator instead of directly to battery and ignition connectors. was driving down the road and every warning light possible started flashing and car died. Battery isolators are solid-state devices which allow electrical current to flow in one direction only, thus permitting the alternator to be connected directly to two batteries without fear of one higher charged battery discharging into the lower charged battery. A bad ground shouldn't overcharge a battery- but if you want to verify condition of alternator and put this out of the way for the test- hook a jumper cable from neg battery terminal to alternator mount or alt. 1v at rest (yes it is high, but that's because we tested immediately after switching off engine. Battery post are clean and not corroded same with the clamps that attach to them. If you connect the amplifier negative lead directly to the -ve battery terminal, then if the thick negative lead from battery to frame becomes broken, the starter current might flow through your own amplifier -ve lead. The performance problem will come from "back-feeding" power through the old charging wire to the junction. The other two wires feed power to the field coil. It’s not charging the fridge, it is providing a power source for the fridge, via the battery. 5) when runing. Have you tried touching a hot wire to the lose white wire with the engine running to see if it shows a charge on the gauge? I take it the heavy cable attached to the bottom of the alt. Another option is to switch to a 6-volt positive ground alternator: This information came from the following question by Jim: I have purchased a 6V pos. A smart voltage regulator for the alternator should control and taper off the charge to prevent this and can also be set, within limitations, to accommodate your needs. I ran an extra ground wire from the firewall directly to the alternator's mounting bracket just cause I'm paranoid about bad grounds. This is because the alternator has to replenish battery charge lost at idle or low engine RPM. The fuse link is a protection device like a circuit breaker. Re: Alternator whine in speakers. Much more than the headlights, rear window defroster, radio, etc. If there is a fault on the DC side of the charger the AC green wires size may not be able to handle this fault and could be undersized in having to handle that fault. At the alternator, connect the white with red stripe wire of the engine wiring harness to the threaded stud (the "A" terminal) on the alternator. • Powermaster 1-wire Alternators require only Battery Charge wire and a proper Ground path to Battery to operate. Before you start, I will assume your battery is a bit low. The alternator has to be the problem if you have voltage to both browns and the large wire to the starter is connected. It means the chemistry isn't working. If the alternator is broken, the automobile will run but no electrical power will be created. Note: the wiring that comes with our kits should be used as it is sized to handle the amperage. The wiring harness is likely grounded to the frame under the tank via a green wire where the coils bolt to the frame. It is very important that the battery voltage never drop below 12. A tractor is only positive ground frame if the positive battery post is tied to the frame. SUPPLY CIRGUITS - DO NOT connect electrical accessories directly in circuit between alternator and voltage regulator (i. Alternator battery + Service battery + Solar panel + Vehicle ground/Solar panel – Starter battery will be pulse maintained directly from the. 0, AX15, SOA, RE SOA Springs, 1" shackles, 1" body, SYE, locked 44, locked 8. It's definitely an alternator or wire issue. And one more thing, I actually ran a new 8 gauge wire directly from the charge terminal of the alternator, through an 80 amp fuse, and then to the battery side of the shutoff switch. Ground either field terminal, and hook the remaining one to a known good battery source, like the start relay stud. A ground wire must be as large as the positive, or supply, wire to the battery. It should be easy to find, just follow the Neg. I don't have an NCV3 to look at for "ground truth", but the 2007 wiring diagram i have shows a RED wire going from the battery to the distribution block, where it's jumpered (not fused) to the red wire going to the starter, and then onward from there through a 300 amp "fuse" on its way to the alternator. Touch the positive voltmeter lead directly to the alternator case or ground connection. Also to make sure your system is charging, pull the ground cable off of your battery while the car is running. This circuit will keep a 6 volt NiCAD battery (b1) topped off with a few hours of sun every day. REQUIRES A GOOD GROUND In order for an alternator to charge properly, an alternator must be grounded to the engine block. edit: the battery also need to be secured by 2- 3/8" minimum bolts(or allthread) through the framerail. On the Type89 cars I recall it being on the drivers side-top of the the trans. Reason for this high voltage 1. They replaced battery. new battery,new alternator aftermarket. ) Checking for voltage drop Start with a good ground, which would be the negative battery post. Be careful if you decide to remove and clean these, since the large red wire with the ring terminal is the alternator output and is connected directly to the positive side of the batteryremove the ground terminal from the battery to prevent fireworks in the event that you accidentally ground any terminals while you are cleaning them. In a positive ground system,the vehicle's steel frame or chassis is directly connected to the positive side of the battery via the positive battery cable. Voltage drops on the negative side can cause overcharging (this fools the voltage regulator into thinking the battery is low). A poor performing alternator will shorten battery life as battery life is a function of charge condition over time pure and simple. wire, tab, terminals and installation instructions. tors, your Balmar alternator provides even greater efficiency when charging deep-cycle flooded, standard flooded, gel, AGM, Optima and other marine battery technologies. Run a piece of cable sized the same as the + on the amp directly to the - battery post. #1 you have a very dead battery, and a high out put alternator. Check to make sure the belts are tight and not slipping. Try with a cable directly from the battery to the alternator and check the readings again. Also, "battery too dead to for engine to run" is BS too- the alternator can provide *plenty* of energy for a spark. One wire connects to each bank, and a ground wire goes to negative. Testing through extended harnesses or cable extensions may increase the reading. I would first clean the connections to the alternator. The IBS is attached directly to the negative pole of the battery via the pole terminal. If you see higher readings, chances are the alternator is good (more sophisticated testing equipment is needed to detect an open or shorted alternator diode). If you want to use it as a one wire, connect the charge wire to the battery and alternator and you're done. The fuse link is a protection device like a circuit breaker. Note: The ELD circuit is pretty easy to fool. You could just connect to big terminal on alternator or bring it up to the + of battery (my preference). In a typical situation where periodic inspection and minor maintenance is possible, the alternator system is most common. The battery supplies electrical power during starting or during periods when the current demand of the vehicle's electrical system exceeds the output capacity of the alternator. There are typically four connections on the alternator, an output terminal to the battery, the ground terminal, the field connection, and a separate connection to the stator. Charging Checks. Oh well, decided to clean it up anyway. If you unplug the alternator connector you'll see the light go out so the alternator definitely sets the light. When the discharged battery reaches 10. Shopsarahmac sells a wide range of items, from dress, electronic, accessories to all another products. The other two wires feed power to the field coil. This allows a return path for the huge amounts of electrical current used by the starter motor when it cranks or "turns over" the engine. Within a month the alternator blew and my battery was slaughtered because of it. Allows all batteries to reach full charge. Record obtained reading. The alternator came on the scene soon after, and the old DC generator began a slow. Although an automobile battery is normally charged by the car’s alternator while the car is running, there are times when the battery dies for various reasons and needs to be connected to a charger. Including the ground with a remote battery. If you have an alternator and are using the factory style indicator light on your dashboard, it is a pretty helpful thing. It stands to reason that the ground side handles just as much current, so it needs to be 4 gauge too. The directional current will always encourage corrosion and wire breakdown over time starting from the first point of ground connection back to the battery ground post. From Cars To Computers Recommended for you. The original generator had to be replaced with a a suitable alternator unit, this was the easy part involving a modified mounting bracket but then the battery, ignition coil, wire grounding configuration had to be reversed (including the amp meter) to negative ground arrangement and all of the lamps had to be changed to 12 volt. Technician B says that the voltage drop between the case of the alternator and the negative terminal of the battery should be less than 0. I replaced the alternator, cleaned all ground wires, ran a ground directly from the battery to one of the alternator bolts. A battery rated for marine use is designed to maintain at least an 80% SoC (state of discharge) after sitting uncharged for 12 months or more. edit: the battery also need to be secured by 2- 3/8" minimum bolts(or allthread) through the framerail. It has all the circuitry necessary to automatically sense when the alternator is spinning, and therefore energize itself. well here is the rest of the story, when I first got the car together a few months ago, The car drained the battery in the first day or 2, and it turned out being a loose alternator cable nut. except sometimes thr battery light will go off and will charge but. had alt and battery both tested and both were bad. i would suggest 8AWG from a welding supplier. Engines With Combined Alternator and Starter Wires - typical of outboard motors ALTERNATOR STARTER Start Battery Alternator Wiring may Include the Following: 1. if you need to tend to the ground cable at the frame location first DISconnect it at the battery and remove the key from the ignition switch whenever doing any battery/alternator type work. during cranking the voltmeter displays a reading of 878 mV technician A says that this reading indicates that the positive battery cable has to high. If you want to use it as a one wire, connect the charge wire to the battery and alternator and you're done. I looked up the wiring diagram and was able to locate and remove the wire, except there seems to be a problem: it was just a 10 ga wire running from the alternator to the starter, and about half way in between was another 10 ga wire spliced into it running to a junction block on the firewall above. Alternatorman says, you do not need to rip out your old wiring when upgrading. Removing the battery from the circuit allows those spikes and transients to travel around, endangering every semiconductor circuit in your car. The wiring harness is likely grounded to the frame under the tank via a green wire where the coils bolt to the frame. I have the house battery bank (2 group 27 12v in parallel, 110 ah each) located about equidistant between the wheels, under the floor with a lift out panel for maintenance. There are some general aviation charging systems that are "A" circuit or field to ground. Removal is a matter of unbolting the generator, removing the mount, and removing the voltage regulator. Upgrade your alternator wiring. Please note that these products are meant to be used with negative ground alternator systems, and are not recommended for use with self energizing style alternators. I have been reading some conflicting information on once the car is started if the cars electrical system runs off the battery or alternator. There is a crimp in there somewhere though and I can't remember if the power goes from the battery directly to the starter of if it jumps through the alternator first But the grounds. You could also check for continuity from the + main terminal on the alt to the + on the battery (System powered down). Well, to the secondary batttery, that is. Instantly! With everything off and all fuses and circuit breakers removed, get +9. Augment this with a wire from one of the alternator mounting bolts to the vehicle frame. New stock replacement battery cables as well as lightweight performance racing batteries. Conversion from a generator to an alternator is a task that requires the vehicle to change from positive to negative ground as an alternator will never work on a positive ground state. How to Wire an Electric Winch. 6 gauge alternator cable with fuse link. You could damage the alternator and regulator. Have a meter to show the voltage increase from the alternator to prove that you are drawing power from the alternator, not the battery. isolated ground terminal so a ground wire will need to be added from alternator ground to battery ground.