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Old 01-22-2004, 06:22 PM
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Where to start on blinker problem?

I know this is a hot rod site but you guys are great.My problem vehicle is a 1986 GMC 3500 dually that came new with a diesel but has been converted to a 350.Both blinkers work real slow and when you have the left one on and use brakes it stops flashing,but the right blinker is unaffected by the brake light.I put a bigger flasher in it last night and it speeded them both up like they should be but the problem on the left one was still there.

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Old 01-22-2004, 06:34 PM
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Check all your bulbs real close. Look at the dual filament ones real good to make sure you do not have any filaments blown and crossed over to the other filament.

Vince
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Old 01-23-2004, 06:58 AM
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Your turn signals and brake lights share a common wire. I suspect a corroded connector between the left brake light and the left turn signal junction and the left tail light. If I were trouble shooting it, I would start at the rear light and work forward after checking that the light itself is well grounded.

Trees
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Old 01-23-2004, 07:04 AM
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Like Trees said - Check your grounds. If your lights are mounted in a plastic fender your ground may not be strong.

Last edited by evltwin; 01-23-2004 at 07:11 AM.
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Old 01-24-2004, 06:42 AM
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Thanks guys for the help,I found the problem last night some bonehead spliced into one of the wires on the brake light switch at the pedal and ran a single wire all the way back to the rear and hooked it into the brake light wires and double fed it causing my problems.Man you see everything on vehicle wiring!!
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