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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: BIG CHEVY on April 08, 2011, 09:33:07 pm

Title: gen light probs.
Post by: BIG CHEVY on April 08, 2011, 09:33:07 pm

i just redone my whole brake system on my k-10......   its wonderful. i drive it about 5 miles and start back home.......i notice in the dark one of my 4 red warning lights come on to my left. i thought it was the brake light but it was my gen light. it would come on and go off erepeatedly. most times it would go off under load but by the time i got home it just did it when it wanted. i checked the belt.   its tight. i took the pos cable off while running and it didnt go dead and while the cable was off the light still came on...off.... any ideas?

Title: Re: gen light probs.
Post by: Irish_Alley on April 09, 2011, 12:34:08 am

Put a volt meter on the battery and see if it changes any. Could just be a loose/bad connection wire in the cluster pig tail

Title: Re: gen light probs.
Post by: bake74 on April 09, 2011, 05:41:55 pm

     As Irish said, then work your way back to the light, either you got a short that is touching every so often, or something is going out.

Title: Re: gen light probs.
Post by: topp on April 09, 2011, 07:46:55 pm

I would check the belt.  Make sure it is not to loose and not worn.

Title: Re: gen light probs.
Post by: BIG CHEVY on May 07, 2011, 05:16:53 pm

still doin it........come on and goes off in waves. not like a lightbulb where it comes on. starts in a faint glow and then full light.then goes dimmer....
had my alt checked 5 times. gotta say it was good. can someone tell me how to run the volt meter? well.......not how but how/where to check my system in steps? start at batt.....then where?

Title: Re: gen light probs.
Post by: zieg85 on May 07, 2011, 05:40:24 pm

Check the negative battery cable and make sure your engine ground to cab it there...

Title: Re: gen light probs.
Post by: Skunksmash on May 07, 2011, 07:44:36 pm

What do you mean by "gen" light?

Title: Re: gen light probs.
Post by: BIG CHEVY on May 07, 2011, 08:11:40 pm

one of my 4 red indicator lights on my left side.....temp....gen.....oil.....brake.

Title: Re: gen light probs.
Post by: Irish_Alley on May 08, 2011, 12:04:38 am

have you checked the volt meter on the batter yet? whats that read. and just like your light is telling you it's only going to test bad when that light is on