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02-20-2007, 09:55 PM
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#1 |
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Registered User
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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Brake light short
My brake light works when the light switch in on but when i step on the brakes, the 2nd filament doesn't light up. So, the light stays the same when I apply the brakes.
 I thought the bulb housing was bad, corroded, so I got a new one from LMC, and the problem is still there. Anyone have this problem? I don't have a circuit tester. Going to get one though and try to chase down the problem. Any tips?? Thanks!
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
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02-20-2007, 10:31 PM
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#2 |
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The One And Only !!!
Join Date: Jan 2007
Location: Hole in the woods Florida
Posts: 4,567
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Re: Brake light short
The way I'm reading this it's only one side correct ? If so start at the rear of the truck where the harness plug is, Check for power on two wires with all other lights off and while the brake pedal is pushed. You could un-plug the switch at the pedal and install a jumper wire to activate the lights. If you have voltage at the plug trace the wires in the rear harness looking for any that are broken or pinched.
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93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz !  The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. "Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Last edited by Restrorob; 02-20-2007 at 10:37 PM. |
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02-20-2007, 10:46 PM
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#3 |
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Registered User
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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Re: Brake light short
Yes, pass. side only. Drivers side brake light works fine.
Thanks, Rob! I'll get out and try it out tomorrow.
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
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03-01-2007, 03:57 PM
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#4 |
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Registered User
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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Re: Brake light short
just an update. Finally was able to look at the truck and traced the short to a old trailer wiring harness from the previous owner. Had the cheap "snap on" quick connects for the harness. Looked OK on the outside but when I unsnapped one of them, it was corrodded pretty bad! I just took them all off and re-connected the main lines. Pretty easy.
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
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