mrm Posted August 6, 2023 Share Posted August 6, 2023 Hi I have new battery , new alternator, new starter. It’s not charging. The exciter wire on the alternator is only showing 8 volts. I am looking for a wiring diagram for 1972 - 402 with gauges not lites Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted August 6, 2023 Share Posted August 6, 2023 Does it have an external regulator or internal? 2 Quote Link to comment Share on other sites More sharing options...
mrm Posted August 6, 2023 Author Share Posted August 6, 2023 I don’t know . I am trying to get a proper wiring diagram The alternator has a main red wire two small wires one blue one white As far as I know the white is for gauge and blue is exciter wire from ignition Quote Link to comment Share on other sites More sharing options...
jft69z Posted August 6, 2023 Share Posted August 6, 2023 If you're not sure if the regulator has been converted to the internal type, that could be a problem. If it has been, a wiring diagram won't be accurate, or much help. 1 Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted August 6, 2023 Share Posted August 6, 2023 Look on the back side of the core support behind drivers side headlight see if there's a little black box, if there are wires hooked up to it probably, if not someone may have bypassed it. It also has to be grounded probably if it is being used. 1 Quote Link to comment Share on other sites More sharing options...
jft69z Posted August 6, 2023 Share Posted August 6, 2023 Here are some 1972 diagrams, both factory & from Mitchell Vintage (below as a .pdf file). PC000174-Engine-body.pdf 2 Quote Link to comment Share on other sites More sharing options...
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