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Re: My backup lights do not work bulbs good 1986 chevy...
If the bulbs are good than you need to use a test light and make sure that there is power to the light socket. if there is not power than you either blew a fuse or there is a break in the wire somewhere
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get a test light and see if you have power at the bulb plug, yes there is a fuse for lights ....find it and check it... I had 3 chevy/gmc trucks and they all had two fuse boxes one under dash one over drivers front fender well... check for power at fuse/relay (pull the fuse out connect your test light to a ground - one side of the fuse socket should have power (with light switch on) if it doent it is probably the switch at the dash...
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If both tail lights are not working it is likely to be a fuse or bad connection under the hood or a connector at the back see if you can trace the wires to a connector and see if it is dirlty or corroded.
the brake lights and the rear turn signals should be the same bulb check the bulbs to make sure they are not blown does your third brake light work if all brake light are out and the bulbs are good check the brake light switch on the brake pedal
simple thing first... make sure the bulbs are not burnt out... check the fuse.... then there is a sensor/switch located either on the steering colunm or on the transmission. quick test... put it in reverse and jiggle the shifter... if they come on that takes care of the first two issues....
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