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71 C10 generaor light on

Tiny
CHEVYRIDER71
  • MEMBER
  • 1971 CHEVROLET TRUCK
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.
Sunday, November 18th, 2007 AT 10:34 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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?
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Sunday, November 18th, 2007 AT 11:22 PM

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