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Why is there no rear driver side brake light or turn signal?

All others work properly on passenger side. Parking lights work fine. I have changed bulbs,both flashers,and fuses.

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  • Mark Fuller
    Mark Fuller Apr 23, 2015

    It's a 3 wire socket.

  • danoyachtcap
    danoyachtcap Apr 23, 2015

    I wrote this to try and help.......Troubleshoot your lights Fixing lights can be difficult: You have a tail or brake light that doesn't work, but you replaced the bulb and no change. You'll have to troubleshoot, so buy a simple volt/ohm meter. Be sure the power is off and no power on any of the socket pins. Then clean the light socket and connection pins with a stiff brush or steel wool. First, measure all the light socket pins for power. If you don't see any voltage, must be a fuse out or a broken wire or you aren't getting a good solid ground reference. Turn power off and make sure the socket ground is really ground by using the ohmmeter between the socket ground and a known good ground. If the ohmmeter reading is 1 or 2 ohms the socket is probably good. If the ohmmeter measures higher, then the ground connection is bad or ground wire is broken. Try to trace the ground wire, run your own wire if you have to. Once the the socket ground measures ok, then you have to determine which hot pin is bad. There are two hot pins, one for each filament, tail and stop light. Pick one and measure the voltage referenced to the, now good, socket ground. You should have power now, so try a bulb in the socket.

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  • Cars & Trucks Master
  • 2,899 Answers

Troubleshoot your lights
Fixing lights can be difficult:

You have a tail or brake light that doesn't work, but you replaced the bulb and no change. You'll have to troubleshoot, so buy a simple volt/ohm meter.

Be sure the power is off and no power on any of the socket pins. Then clean the light socket and connection pins with a stiff brush or steel wool.

First, measure all the light socket pins for power. If you don't see any voltage, must be a fuse out or a broken wire or you aren't getting a good solid ground reference.
Turn power off and make sure the socket ground is really ground by using the ohmmeter between the socket ground and a known good ground. If the ohmmeter reading is 1 or 2 ohms the socket is probably good. If the ohmmeter measures higher, then the ground connection is bad or ground wire is broken. Try to trace the ground wire, run your own wire if you have to.
Once the the socket ground measures ok, then you have to determine which hot pin is bad.
There are two hot pins, one for each filament, tail and stop light.
Pick one and measure the voltage referenced to the, now good, socket ground.
You should have power now, so try a bulb in the socket.

Posted on Apr 23, 2015

Testimonial: "I've tried a test light and I'm not getting any power to the wires at the rear except for the parking lights."

  • danoyachtcap
    danoyachtcap Apr 23, 2015

    Are you sure your measurement is from a good known solid ground? Make sure it is. If really no power then there has to be a fuse or a broken wire. Make the measurement direct to the socket hot pins and a solid ground, even if you have to string your own test wireto the battery (through a fuse).

  • Mark Fuller
    Mark Fuller Apr 23, 2015

    They are 3 wire

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  • Cars & Trucks Master
  • 1,326 Answers

Bad socket

Posted on Apr 23, 2015

  • 1 more comment 
  • Mark Fuller
    Mark Fuller Apr 23, 2015

    No power to socket or wire at socket at all. Except parking lights.

  • Richard Faber
    Richard Faber Apr 23, 2015

    broken wire

  • Richard Faber
    Richard Faber Apr 23, 2015

    does the socket have 3 or 4 wires

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