1988 GMC 2500 P/U Alternator ?
Hi guys -
Sorry for the long post - need help.
Working on a friend's truck. 1988 GMC 2500. Did the loose/sloppy tilt column repair, and in the process pinched the harness to the turn signal stalk, which caused the wipers to be on high speed as soon soon as key turned to run. Took it apart, found and repaired the pinched harness and he went on his way.
Next day, battery was dead. Tested voltage at batt posts with engine running- batt voltage only. Tested at stud on alternator, engine running, batt voltage only. Removed fat red wire from stud, started engine - .25 volts at back of alt at idle, about 2 volts with some RPM.
Took alt to Autozone - alt failed test. Bought new alt and installed - same issue - minimal voltage from alt.
I believe this is a CS alternator. Big stud and a 4 pin plug. Only one wire in harness to 4 pin plug - green as I recall. (excite wire?)
One other thing - after steering column fiasco, noticed that voltmeter not working. Is it possible the excite wire feeds through the voltmeter and with the pinched harness the gauges fuse blew?
Any and all ideas much appreciated!! Thanks!!
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