Sounds like a turn signal switch problem.

Answered by Service Writer (expert)
9,955 answers provided

Thanks for the reply. I forgot to mention that my front signal lights come on just not the rear. My indication that something was wrong was the rapid flasher near my speed indicator. Only the rear lights are not working.

Response from jlarose
1 question asked

Try to work the hazard button stem several times or more, sometimes that flushes out and helps support the bad switch theory. It still sounds like a t/s switch prob. Is there power getting to the rear brake lights?

Answered by Service Writer (expert)
9,955 answers provided

Well I have tried everything that I can come up with. Check the wires for cuts or disconnects, played with the switches. I not sure how to dertemine if power is getting to the brake lights. Can you explain? What I did notice is that I have a u-haul cable connection for my trailer and it indicates with the lights on the plug that everything is working fine. I see the flashers flashing and the brake lights working. I unplugged the trailer connector and attached the primary cable running from the cab to the cable that runs to the rear lights, still no success. My parking lights work in the rear, my reverse lights work, everything but what I mentioned before. I reconnected the u-haul plug assembly and played around with the wires to see if it was the u-haul cable assembly but still no changes to the rear lights. So its not the u-haul plug assembly. Is it possible that it may be a computer thing or what?

Response from jlarose
1 question asked

Check your email for diagrams. This is not a computer thing. You need to have a test light to find where the power stops when the brake pedal is pressed.

Answered by Service Writer (expert)
9,955 answers provided