alternator problems
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=114764
Printed Date: July 06, 2025 at 5:08 AM
Topic: alternator problems
Posted By: BrianB1975
Subject: alternator problems
Date Posted: June 29, 2009 at 6:24 PM
Hi everyone,
I have a 1992 GMC pick-up (5.7 2wd). My initial problem was all of a sudden the battery light came on and the guage was staying near 11-12 volts. I figured with 177,000 miles and an original looking alternator, it probably was going bad. I bought a new alt and battery, same problem. just as a goof exchanged the alternator for another one cme problem. I hooked up a volt meter and tugged on the groud cable, ground strap, positive cables, etc. with no change. The meter stays around 11.6-12.0 volts, every now and again going up to 13.0-13.4 volts (that only lasts 15 seconds at best, then back into mid/upper 11's). Please help any info is greatly appreciated.
Thanks,
Brian
Replies:
Posted By: the_one369
Date Posted: July 01, 2009 at 5:25 PM
on the back of the alternator where the wire harness is. unplug the harness and check to see if there are any damaged connectors in the plug.
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