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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: boulky12 on October 15, 2016, 06:26:45 pm

Title: High Beams just stopped working
Post by: boulky12 on October 15, 2016, 06:26:45 pm

Hey guys. My High beams just randomly stopped working one morning.

I checked for voltage at the green high beam wire on the headlights. It was very little to none. It was fluctuating between .03 to .08.

I cleaned the 2 grounds on the core support for the headlights, with no change. But I don't think its a ground issue because there was never any flickering. They just stopped working.

I noticed I can now turn my low beams on/off by pulling back on the high beam switch. That didn't used to happen.

I also noticed the 2 blue dots in my gauge that would indicate the high beams were on, are now gone.

I don't know if this would have anything to do with it but I always used my high and low beams. Any time my headlights were on, my high beams were on.

My truck is an 86 with the 4 Headlights.

Whats do yall think is going on here?

Thank you

Title: Re: High Beams just stopped working
Post by: bd on October 15, 2016, 07:44:28 pm

Probably a bad dimmer switch.

Title: Re: High Beams just stopped working
Post by: boulky12 on October 15, 2016, 08:06:38 pm

Alright I'll pick up a new dimmer switch one of these days.

Thanks

Title: Re: High Beams just stopped working
Post by: square81 on October 19, 2016, 07:38:03 pm

Had the same issue with my truck. Replaced the dimmer switch. Worked good.

Title: Re: High Beams just stopped working
Post by: boulky12 on November 04, 2016, 03:44:23 pm

Yup dimmer switch was the fix. Now all 4 headlights work again.

I was able to replace it without dropping the column. It was a big pain in the butt, but it is possible.