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Charging System

DezrtRat
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DezrtRat

DezrtRat

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My charging guage is indicating that it's not charging correctly (leaning left). I messed with some wiring to the alternator yesterday and today it worked fine coming to work. Just took a short drive and it's leaning toward the left again. I'll take a closer look at the wires/plug again but my question is what other components are involved in the charging system on these trucks? The batteries are new and I had the alternator checked in November (two days before my wreck) and it checked good then.

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Mopar1973Man

Mopar1973Man

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PCM is the voltage regulator...Blue wire should be hot (+12V) with the key on. Green wire is the field control which the PCM varies the ground signal... Hence why the passenger battery gorund is very important.Black lead is the charge lead going back to the PDC to the alternator fuse. Check the fuse with ohm meter (removed) so you can verify the fuse isn't cracked. If you got a crank sensor (or cam sensor for older models)... The RPM signal is what triggers the voltage regulator...

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