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The bulb sockets are known to cause 'dead bulb' symptoms. Each socket has a metal tang intended to contact the bulb case but the tangs get bent and no longer make contact. I used a straightened paper clip wire with a small hook bent onto the end to pick at the tang and raise so it can contact the bulb.
Also, the factory grease hardens to putty. Pick out the old grease from the sockets and bulbs, replace with a fresh dab of dielectric grease. For procedure on a 99 Tahoe go here.. http://wiki.answers.com/Q/How do you change brake light bulb on 99 Chevy Tahoe
The points below are to correct some common myths I encounter frequently.
The bulb negative terminal is connected to ground so a short to ground after the bulb is only a duplicate.
A short to ground before the bulb will remove the bulb from the circuit and prevent 12V from reaching the bulb so it will not light.
Too big of a fuse will have no effect the bulb draws a fixed amount of current at 12V. Amps is potential energy, for example your home may have 200 amp service from the street but you can use a 60 watt light bulb.
Oil on the bulb from your fingers will not cause a standard incandescent type of bulb to become too hot and burn out. This may not hold true for a high temperature bulb such as halogen or xenon.. check with the bulb manufacturer.
LED bulbs can produce significant heat, have specific voltage tolerances, and can be damaged by improper voltage.
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Do airplanes have turn signals?
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Why does your 1996 Blazer Keep blowing the flasher out for the turn signals?
You have a short in the wiring or at one of the bulb assemblies.
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my turn signals do not work in my 1992 Pontiac Firebird
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The turn signals are not programmable.
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Required by law (motorcycles manufactured before 1973 are not required to be equipped with turn signals.)
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You use your arms out he widow as signals.
Are the old turn signals still in use?
If you mean turn signal hand signals, then yes.
How do you know your turn signals are burning out?
You know a turn signal has burnt out when the light on the dash flashes very slowly, or just stays on until you cancel the signal. I don't think there is any way to know that it is about to burn out.
Why would your hazard lights work but both turn signals do not work on a Chevy s10 pickup?
hazards and turn signals have separate flashers. replace flasher for turn signals
