1996 GMC Jimmy 96 Jimmy not charging properly.

Tiny
THENEWGUY33
  • MEMBER
  • 1996 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 120,127 MILES
96 jimmy s15 v6 auto. I noticed last week that when I pressed the gas the voltmeter on the dash went down and headlights dimmed. All returned to normal when I let off of the gas. I had the battery checked and needed replacing. I had the alt bench tested 2x both tests showed good (diff reading both times on same machine). I had the system checked in the truck while running and said I needed an alternator. Replaced that. Now truck charges at about 10-11 volts according to guage. With accesories on put a large drain on the truck. There are new battery terminals, alternator and battery. Any ideas here? These tests and results are getting expensive.
Sunday, August 30th, 2009 AT 2:20 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When the engine is idling with a heavy load it should read above 13.5 volts or better-your reading is very low possible alternator problem or wiring.

Check gauges fuse no.4 10amp if okay-review below charge circuit


https://www.2carpros.com/forum/automotive_pictures/12900_alty_47.jpg

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Monday, August 31st, 2009 AT 4:45 AM

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