I have changed the fuse, brake switch and bulbs still no brake lights. is their a relay somewhere
Yes there is. Above the brake pedal there is a switch tat turns the lights on when you press the pedal. It is tough to replace due to the lack o room to put your hands. but is an inexpensive part.
Testimonial: "i have already replaced that switch and still no lights, thanks though, i appreciate your time and help"
Did you use a test light or just look at it? One of the more effective tools in diagnosing an electrical problem like yours is a test light. The test light allows you to prove if electrical power is present in the circuit before replacing parts. With a test light, start at the fuse, then move to the stop light switch. The stop light switch should have electrical power to one terminal of the connector at all times. If not check wiring back to the fuse. When you push on the brake pedal a second and third terminal (if equipped with a third brake light) will have electrical power
Many vehicle’s brake light circuits share the same wire as the turn signal. If this is true on your vehicle, turn the directional signals on. If they work on both sides on the rear of the vehicle then the wiring and bulbs to the back are good. If the stop light switch is good and the wiring to the rear is good then you likely have a bad directional switch. Why? because the brake light circuit travels through the turn signal switch.
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Make sure someone didn't put the wrong bulb in the socket, it should take a 3157, I have seen chevy's where you would hit the brakes with the key off and the brake lights work, and the instant the key was turned on and the day runners came on they wouldn't work, and all it turned out to be was someone put the wrong bulb in the brake-light socket. Other than the fuse, there are plug ins at the rear where the bed mounts to the frame, they feed out of the rear bed pillars directly under the tail lights, it is possible they could have been pulled loose by a trailer light harness, make sure the wires from the trailer light harness aren't shorting out. And check the brake pedal switch to make sure it isn't defective, new doesn't always mean good. Make sure there is power going to the brake pedal switch. If these things don't fix your problem you might have to get your multi meter out.
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