71 C10 generaor light on

1971 CHEVROLET TRUCK
Avatar
CHEVYRIDER71
  • MEMBER
  • 2 POSTS
My generator light came on in the truck. I replaced the alternator and the belt but light remains on.When I idle up the engine,the light goes dimmer and has gone off but then back to on when idled back down.
Nov 18, 2007 at 2:34 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Double check battery connections. Get a voltmeter read the open battery voltage should read 12.4 or better-record it now fire it up meter should read between 13.5 to 15.5 volts not in this range check brown wire back to gauge/ignition switch.

Also check gauge fuse 20 amp at left side of dash. Does it have an external regulator?
Nov 18, 2007 at 3:22 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle