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No Left Stop/Turn Signal Light On Trailer

Question:

my left turn signal and brake light do not come on the light comes on but no turn signal or brake light all other lights are working

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Expert Reply:

If you are just having an issue with the left side brake/turn signal light on your trailer then the first thing I would do is test the pin responsible for this signal on the vehicle side trailer connector. If the pin does not have power then most likely you have a blown fuse or bad relay. If you do have power then it could be a few different things on the trailer. If you trace this wire (usually yellow) back to the light assembly from the trailer connector that should then help you rule out a wire short. If there are no shorts then the issue is going to be either a blown bulb inside the taillight assembly or the taillight has lost its ground.

If you can provide more information on the trailer/vehicle then I may have better advice for you but the above will be a good start.

expert reply by:
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Conner L

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