Something could be drawing on it and you might not be able to see it. As Steve said disconnect at night and if battery is good the next day that is a good sign.
The next step would be to...
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Type: Posts; User: prerunner1982; Keyword(s):
Re: Alt vs pcm/ecu
Something could be drawing on it and you might not be able to see it. As Steve said disconnect at night and if battery is good the next day that is a good sign.
The next step would be to...
Re: Alt vs pcm/ecu
Everything I have read indicated the PCM handles the voltage regulation duties.
A previous owner had put an external regulator on my XJ that went bad and upon research it seems it was done by the...