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I have a 1979 vw lt35 ,with slow and dull indicators. i have put a volt meter on the wires , the only show 5.4 v. The in put volts are 12 ?

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Great! you are most of the way through your issue. With the engine not running, you are correct, 12 volts (actually 12.4 to 12.6) with the engine off and nothing else on...

A drop to 5.4 indicates a poor connection, keep moving upstream, and eventually you will find the resistance, perhaps a connection that has high resistance.... Look for discolored or slightly deformed (from heat) plastic connectors. Remove all heat damaged wiring and connectors.

Posted on Mar 15, 2011

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vrwiring.jpg

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My mom has the same problem w battery w. chrysler 300m(2002) she allready replace w. new battey then chrysler service dept. told her the battery was fine n replace her starter now electric shop says it is...


Sounds like alternator if the battery is not staying charged or the output from alternator the big red wire is lost connection to battery +.
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When you wire it in, run a hot wire directly from the battery to the volt meter (this will give you a more accurate reading) The instructions will come with the volt meter on how to wire it. Just make sure about the hot wire coming directly from the battery.

What I would do first is take off the alternator and go to a parts store and have them test it for free. This will save any additional purchases. Good Luck.

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