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#1 |
Fetzer Valve Technician
Join Date: Jun 2003
Location: Stillwater, OK
Posts: 205
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Tailight Problem
I am having a problem with my taillights. When I have my headlights on, and I hit the brake, the drivers side goes completely out. But If I dont have my headlights on, and hit the brake, It works just fine. Anyone ever had this problem before? It sounds like a grounding issue to me, but I cant find anything wrong.
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1972 Chevy K10 SWB |
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#2 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,553
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That is a new one on me, different circuits. Try unplugging the turn sig switch and see what happens, may have 2 problems. What about the hi-beams
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#3 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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I don't think it's a ground problem cause the light works as long as you don't step on the pedal with the headlights on. KW is right about the different circuits. The wiring diagram shows the taillight on the left side powered by a 18gauge yellow wire. The headlight switch also powers the tailights both in the half out and full out positions. The circuit also runs through the turn signal switch wiring in the column. Have you had that out or installed a new column before this problem?
One thing that comes to mind is when you step on the brake it cancels the brake light if the turn signal is on to that side. Could the wires be switched or the bulb be in so that the tail light is in the brake light position? I know that the lugs on the bulb are off center to prevent this but I've seen it happen. There is a wiring diagram thread in the FAQS on page 2. I have a 1967 to 1987 Haynes manual I will read to see if I can be of more help.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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