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Re: 1998 chevy truck
Well, there's too much power being drawn through someplace. Have you added after market electronics recently? If yes, more then likely the power cord has been hooked up in wrong place. Find a better source of power. Have you worked with any wiring under dash, bed, or cab? If yes, well, even if you haven't, wouldn't be a bad idea to go through and check to make sure no fried or grounded wire.
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Check your fuses underneath the drivers side steering wheel. Flip the plastic cover over and there will be a diagram showing the fuse that controls the taillights/stoplamp. Pull the fuse out and replace it with the same number fuse and your taillights and brake lights will work again. If the fuses are ok, pull each taillight bulb out and replace it with a new bulb. Sometimes when one light bulb fails, all of them will fail.
well u have two seprate problems the hazards and turn signals have a flasher that needs replacing if the fuse is good on the fuse box marked signals .and there is a brake light switch under the dash board near the brake pedal it has two wires on it check the wires make sure they are connected if so replace the brake light switch
1. Check for power to the turn signal switch on the White and Yellow wires with the brake pedal depressed. If low voltage, check the stop light switch operation on the brake pedal. Check the Center High Mount stop light (CHMSL) circuit operation.
2. Check the black wires at the turn/brake sockets for a good ground.
3. If all OK, check for a bad frame ground to battery negative.
4. and dont forget to check the rear bulb
check the wiring from the tailights back to the fuse panel, it sounds like an open connection. if i recall correctly check under the dash on the drivers side near the fuse panel for a bunch of wires in a bundle and look carefully for a wire or two that are cut/shorted/or seperated, you can also check under the drivers side kick panel by the hood release.
Yop may have a very common problem unique to that year car.
I have two definite fixes for you:
Open the trunk. Look at the wiring harness that is hooked onto the driver side arm that holds the trunk lid to the body. Untape the wiring harness from the edge of the trunk lid back towards the driver rear seat. You are most likely going to find a broken wire or two, prob a green with a red tracer. The repeated action of lifting/closing the trunklid seems to break the brake/tail power wires. If the wiring harness is perfect, no breaks, AND you have a rear spoiler, remove the trunk interior trim that faces the driver side 1/4 panel. Hidden behind a brace will be a small box. This is the brake lamp sensor. If it has failed, you may need to replace this box. Either fix should resolve your issue.
Somtimes the bulbs get a dead short in them even though they look OK. Install new bulbs or remove all bulbs on this circuit and reinstall one at a time to see if fuse pops. I had this problem with signal lights on 95 chevy 1500 and turned out the back up bulbs were on the same circuit. Bad back up bulb so once truck was in reverse it blew the fuse and then the signals did not work. Cheap enough to be worth a shot.