nascarxx29
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Re: Anyone have any good links to troubleshooting the charging system?
« Reply #1 on: Yesterday at 06:25:06 PM » Quote Modify

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Lets start here at the Alternator.I assume its new and been tested and not defective.And you have a good voltage regulator for the year of your car and type of alternator 1 field or 2 field.Use a testlight to see if you have 12 volts at pos bolt on connection at back of alternator.Then you should have key on power to the alt field which is a blue wire that goes from regulator plug connection to the alt field. Followed by a green wire for the 2nd field of the alternator also coming of the regulator plug connection.You need to be sure that the regulator and alternator are well grounded.And you can check by using a testlight with clip on end on +.And touch pointed end to check for ground on alt and mounting area for regulator .The light has to light.If the alternator and regulator is not grounded well it wont work properly.If you remove pos battery cable and car shuts right down .Then your not charging.If car remains on the alternator is working .But you still need to know your alternator output voltage that should be around 14 volts .If you car is a 70 and up it will have 2 fields and a different type of voltage regulator .If your car is a 69 and down you will have 1 field and a small black box type regulator.If you have a 70 up alternator and want to use it for a 69- car .It can be done by grounding the extra terminal back to a ground with a jumper wire .Leaving you with a 1 field alternator