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Have you checked fuse #13 in the fuse box behind approx the center of the dash?
below is a diagram, keep in mind you are looking at it from the back side, so left is right, and right is left.
What do you mean,,,,we got to start somewhere....
So did you find that fuse?
Where was that flasher relay you mentioned?
Did you replace the combination flasher under the shrouds on the steering cloumn behind the steering wheel?
Good afternoon and welcome to JustAnswer!!My name is ***** ***** I have worked for a Chrysler-Dodge-Jeep dealership for 19 years and I will do my best to help.
I had one doing this same exact thing and it was the wrong bulb. What kind of bulb do you have in the taillight? Should be a 2057....When did this issue start?
If they won't work at all then I will need for you to see if the light is getting 12v when you turn the signals on, if not then you need to check fuses 1 and 16 on the inside fuse panel and fuse 10 in fuse box under the hood..
Here is how it works,
The turn signal system operates on battery voltage received on a ignition switch output (run) circuit so that the turn signals will only operate with the ignition switch in the On position. The hazard warning system operates on non-switched battery voltage so that the hazard warning remains operational regardless of the ignition switch position. When the turn signal switch control stalk is moved up or down, the turn signal system is activated. When the turn signal system is activated, the circuitry of the turn signal switch and the combination flasher will cause the selected turn signal indicator, front park/turn signal lamp, front side marker lamp, repeater lamps, and rear tail/stop/turn signal lamp to flash on and off. When the hazard warning system is activated, the circuitry of the hazard warning switch and the combination flasher will cause both the right side and the left side turn signal indicators, front park/turn signal lamps, front side marker lamps, repeater lamps and rear tail/stop/turn signal lamps to flash on and off.
I attached the wiring diagrams, let me know what you find..
I would start by testing at the tailight and see if it's getting 12v when you press the brake and turn on the taillight..
Start by disconnecting the both LED taillights and then see if it's getting turn signal voltage when you have the brakes held.. Possibly bad LED lights, if you had your factory lights you could install them to test.