Ford F350 Super Duty 2011 Driver rear turn signal and brake light does not work

Asked by heffernq13 Jun 30, 2013 at 01:41 PM about the 2011 Ford F-350 Super Duty

Question type: Maintenance & Repair

We have checked the bulbs, fuses, and wires. All of these work, but the problem persists. We have checked the brake switch and turn signal switch. They work. The lights also do not work on the trailer.

3 Answers
49,185

kbro answered 11 years ago

is everything stock? you have power at the bulb? since you said wires were good then I would assume so. In that case the bulb or a connection issue.

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Guy answered 4 years ago

I had a similar issue and after verifying the wiring, power and fuses were all good, it looked like the BCM needed to be replaced. Before buying one, I decided to try ForScan to check the module; I had some errors due to a battery failure a few months ago. I reset all the DTM's, then ran a self test on the BCM; It ran successfully. I tried the signals and they all work now. This may not be your issue, but I had heard about other BCM issues resolved by resetting the BCM and it worked for me.

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