Why is my charging system is not working? How can I fix it?

Tommy Nutt

Asked by Jan 29, 2015 at 08:35 PM about the 1994 Dodge Ram 1500 2 Dr Laramie SLT Standard Cab LB

Question type: Maintenance & Repair

The battery and alternator both tested
good. The alternator fuse is good. Even
Replaced pcm. Yet no luck. What am I
missing? Please help.

6 Answers


so what is actually happening? if the battery is good and the alternator is charging, then everything is working. Is the battery dying over night or something?

1 out of 1 people think this is helpful.
Tommy Nutt

The alternator is not charging

1 out of 1 people think this is helpful.
Tommy Nutt

I replaced it. And the battery

1 out of 1 people think this is helpful.
Tommy Nutt

The voltage meter reads 12ish. I've researched this problem and it sounds like it's the voltage regulator, inside the pcm. So I replaced the pcm. Yet it still didn't fix the issue


Take the alternator out and have it bench tested. This takes the Pcm voltage regulator out of the equation. It is possible that your new alternator is bad. Have had that happen to me. Also, make sure all wiring is good especially from the pcm to the alternator. There may be a way to test the pcm voltage regulator, that would be ideal, but it may require sophisticated testing equipment.

Bob Beaman

Have the battery charged and load tested. It could also be bad.

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