I'm losing my mind, I've replace the entire tailight wiring harness, yet I still only have one brakelight and no turn signals, but both tailghts do work. any suggestions?

 

I went through the same problem that you have, it is a pain. I replaced and messed around with wires for weeks. It turns out that the turn signal wiring harness was bad in the actualy steering column. Replace that harness and make sure to wire it correctly and you should be good to go!
Matt

 

+1

 

mabey a bad ground

 

Replace the switch in your steering column, I had the EXACT same problem as you and once I changed it out everything is working perfect now!

 

Just a short note,, A BIG thank you ,, the turn signal switch.................That was it!!!! Thanks again, Joe

 

Ain't it fun to get a problem fixed?