dashlights come on when i press on the brakes??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jamie72** · 10-14-2002, 07:46 PM

trying to put my blazer back togeather, noticed today that when i press the brakes the dashlights come on it it the brake switch or a ground somewhere????
thanks

Gordo · 10-14-2002, 07:53 PM

One possiblity could be a rear bulb in wrong, another one could be if the rear light assemblies are not yet installed into truck, thereby not getting grounded.

**Desert Rat** · 10-14-2002, 08:53 PM

I had that same problem it was a bad driver side brake light assembly,i couldnt get it to work right,the bulb area was bad and not getting a good ground,so i put another assembly in problem fixed.

REPO1 · 10-14-2002, 10:44 PM

Sure sounds like a ground problem at one of the lights to me.

Longhorn Man · 10-14-2002, 10:49 PM

A tail light is not likely to try to ground through the dash lights...it would follow the shortest most direct path....it could happen, just not likely.
I'm willing to bet one of your tail lights has the wrong bulb. Pull the bulbs and check if it is a double filliment, or a single. I'll bet there is a back up lamp in one of them.

O'l Buck · 10-15-2002, 01:03 AM

i've also seen stuff like that happen when a taillight filament breaks and bumps up against the brake light filament, when you activate the brake lights, it also puts power to the taillight circuit and therefore turns on the dash lights.

**jamie72** · 10-15-2002, 09:28 PM

well i feel dumb...i have yet to install the taillights just wires hanging.so i guess it will fix itself,thanks guys
i`ll look alittle harder next time before i ask a question.

10-14-2002, 07:46 PM	#1
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,839	dashlights come on when i press on the brakes??? trying to put my blazer back togeather, noticed today that when i press the brakes the dashlights come on it it the brake switch or a ground somewhere???? thanks __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

10-14-2002, 07:53 PM	#2
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	One possiblity could be a rear bulb in wrong, another one could be if the rear light assemblies are not yet installed into truck, thereby not getting grounded. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

10-14-2002, 10:44 PM	#4
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	Sure sounds like a ground problem at one of the lights to me. __________________ 1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH)

10-15-2002, 01:03 AM	#6
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	i've also seen stuff like that happen when a taillight filament breaks and bumps up against the brake light filament, when you activate the brake lights, it also puts power to the taillight circuit and therefore turns on the dash lights. __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

10-15-2002, 09:28 PM	#7
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,839	well i feel dumb...i have yet to install the taillights just wires hanging.so i guess it will fix itself,thanks guys i`ll look alittle harder next time before i ask a question. __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

10-14-2002, 08:53 PM	#3
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	I had that same problem it was a bad driver side brake light assembly,i couldnt get it to work right,the bulb area was bad and not getting a good ground,so i put another assembly in problem fixed.

10-14-2002, 10:49 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	A tail light is not likely to try to ground through the dash lights...it would follow the shortest most direct path....it could happen, just not likely. I'm willing to bet one of your tail lights has the wrong bulb. Pull the bulbs and check if it is a double filliment, or a single. I'll bet there is a back up lamp in one of them.



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