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What causes brake lights and left turn signal to not work unless done manually?
Wiki User
∙ 13y ago
If your sure the wiring is good and the easy stuff is good like the brake switch and the flasher,try This.
Turn on your opposite turn signal and see if the brake light comes back.
If you have a stalk style turn / wiper /etc, the turn signal module is most likely bad . If you replace the module the unit will work normally and your
brake light(s) should come back.
I had a GMC Pick up and an Astro Van where I lost the drivers side brake light.
It only worked when I was turning right. When I wasn't turning only the anti collision and right brake light would work. The turn signal for the left side worked fine indicating the bulb was good as the filament is used for both turn and stop.
Unfortunately the brake lights are routed through the turn signal position switch and when the contacts wear out or corrode it is done.
The unit for my vehicle ranged in price 140 to 250 dollars.
Hopefully this is what you were looking for.
Wiki User
∙ 13y ago
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