Why is my charging system is not working? How can I fix it?
The battery and alternator both tested
good. The alternator fuse is good. Even
Replaced pcm. Yet no luck. What am I
missing? Please help.
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?
The alternator is not charging
I replaced it. And the battery
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.
Have the battery charged and load tested. It could also be bad.
check your 140 amp charging system fuse under the hood.
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