06' Yukon Denali brake lamps inop unless engine is running? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nxtruck · 12-23-2015, 04:32 PM

Guys,
I'm trying to figure out if this is how these trucks are configured. Last night, I replaced the 3rd brake light on my wife's 06' Yukon Denali. When I had finished, I hit the brake pedal to check things out and found none of the brake lights working. Before I replaced the 3rd brake lamp, the two main brake lights were working. Then, I figured I'd turn the key to the run position and retry it. Still no lights. Then I decided to start the truck and retry them. When I started the truck and hit the brake pedal, they all worked.
Are these trucks wired so that the engine has to be running in order for the brake lights to work? If so, that seems strange to me that they wouldn't work with the key in and turned to the run position. Has anyone else had this happen?
Thanks in advance!

GM-power · 12-23-2015, 08:03 PM

I've done it several times at work lol. That's how there set up.

nxtruck · 12-24-2015, 11:42 AM

Quote:

Originally Posted by GM-power

I've done it several times at work lol. That's how there set up.

OK, thanks for that info! I wouldn't have guessed that they're wired to function that way. I even checked my 01' Suburban and the lights on it come on without the truck running.
Thanks again for the input!!

12-23-2015, 04:32 PM	#1
nxtruck Registered User Join Date: Jun 2006 Location: Jackson, Mo. Posts: 607	06' Yukon Denali brake lamps inop unless engine is running? Guys, I'm trying to figure out if this is how these trucks are configured. Last night, I replaced the 3rd brake light on my wife's 06' Yukon Denali. When I had finished, I hit the brake pedal to check things out and found none of the brake lights working. Before I replaced the 3rd brake lamp, the two main brake lights were working. Then, I figured I'd turn the key to the run position and retry it. Still no lights. Then I decided to start the truck and retry them. When I started the truck and hit the brake pedal, they all worked. Are these trucks wired so that the engine has to be running in order for the brake lights to work? If so, that seems strange to me that they wouldn't work with the key in and turned to the run position. Has anyone else had this happen? Thanks in advance! __________________ Chris 1966 Chevy C10 LWB, 434 sbc, TH350, 12-bolt, factory suspension, pump gas 7.02 @ 95.8, 1.45 60' 1965 Chevy C10 LWB, 355 sbc, TH350, daily driver

12-23-2015, 08:03 PM	#2
GM-power Registered User Join Date: Mar 2012 Location: Little Rock, Arkansas Posts: 770	Re: 06' Yukon Denali brake lamps inop unless engine is running? I've done it several times at work lol. That's how there set up. __________________ 1979 Sierra Classic Heavy-half 1996 Silverado x-cab "the daily"



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