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I have a 2002 dodge ram 4x4 quad cab and my tail lights and turn signals work but not my brake lights or reverse lights. My third brake light works. I just replaced the brake switch today. No fuses are blown
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I think I would start at the headlight switch. If your turn signals are working that means that the wires from inside of the cab to the taillights are good.
The high mount brake light gets its own signal from the brake light switch (on the brake pedal). Or at least the wire leaving the brake light switch will splice, one wire to the high mount brake light, and the other for the rear brake lights is routed through the turn signal switch, and coordinated there with the turn signal wires to the rear brake lights. The brake wires and turn signal wires share the same wire, and same filament in the bulbs. It is kind of complicated, but brakes applied with no turn signal, brake light wire goes from brake light switch through the turn switch and out to the bulbs. If brakes applied with turning signal, non blinking brake light wire goes from turn switch to rear light, while the turning signal wire will go through the flasher relay, and then to the rear light to cause blinking.
I hope that makes sense. It appears the problem may be in the turn signal switch for both the turn signals and the rear brake lights.
if the third brake light works then ther is a broken wire. start looking for it at the tail lights and work forward if you cant find the break you can always run a new possitive wire from either the third brake light to the tail lights or if the trailer wiring harness hase power to the brake lights you can splice in there as well. hope this helps
I suspect a bad multi function switch located in the left hand side of the steering column. This switch controls your high/low beams/wiper delay/windshield washer/turn signals and hazards.
I am a Certified Technician and have basic knowledge with electronics in electrical wiring. I searched the web and discovered this is a common problem.
I fixed the problem and it was a simple procedure... The problem is with the reverse light socket at the side with no brake light. This socket functions as a hub to direct current to the brake bulbs.
Remove reverse light socket and re-seat bulb. Check for loose or broken prongs. Replace if necessary.
If the fuse was melted, I doubt that all 4 bulbs went bad at once. It sounds like you have a short circuit there. The power goes from the fuse, up to the head lamp switch and then to the 4 lamps. Check to see if the headlamp switch is working properly. Charlie
Your turnsignal flasher needs to be replaced with a heavy duty flasher.
also, your boat trailor wiring harness is grounded incorrectly or the harness pig tail is wired incorrectly.
this is why when you excite your tail lights and brake lights that your reverse lights come on and the reason that the lights are dimmimg is because your circuits are looking for the correct ground.
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