Intermittent brake lights - The 1947 - Present Chevrolet & GMC Truck Message Board Network

snowball · 06-01-2023, 10:05 PM

HI all,

I'm having intermittent problems with my brake lights.

Tracked it down to the fuse box. it's lose and shaking it gets the lights on and off.

Anybody run into this before?

**RaTcheTmasTer** · 06-22-2023, 05:22 PM

The fuse box is shaking?
there are two screws inside in opposite corners of the box under the dash., and one screw in the middle on the outside I believe. check the harnesses on the outside that they are plugged in completely.
check the screws that join the inside fuse assembly with the outside firewall where the front and rear harnesses attach. by the brake booster.
I think the real light harness goes under the truck. follow if from the rear of the truck forward and make sure everything is tight.

06-01-2023, 10:05 PM	#1
snowball Registered User Join Date: Apr 2012 Location: Texas Posts: 129	Intermittent brake lights HI all, I'm having intermittent problems with my brake lights. Tracked it down to the fuse box. it's lose and shaking it gets the lights on and off. Anybody run into this before? __________________ 1990 suburban r1500 k 350 2wd

06-22-2023, 05:22 PM	#2
RaTcheTmasTer Automania Join Date: Jun 2009 Location: Pleasant Grove, in the Mountain West. Posts: 351	Re: Intermittent brake lights The fuse box is shaking? there are two screws inside in opposite corners of the box under the dash., and one screw in the middle on the outside I believe. check the harnesses on the outside that they are plugged in completely. check the screws that join the inside fuse assembly with the outside firewall where the front and rear harnesses attach. by the brake booster. I think the real light harness goes under the truck. follow if from the rear of the truck forward and make sure everything is tight.



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