Here's my problem: my passenger brake light and turn signal are not working. Yes I changed the bulb. I hooked up a trailer and it's not getting those lights on either. Can you guys give me some direction on where to start? Truck in question is in my signature

 

Be sure the ground is good at the light housing and after that I'd replace the TS switch.

 

Well I dug around and did a bunch of rewiring for switches that the po had installed and I must have tightened a ground that was loose or something because now it's working fine. Thanks for your help William!

 

I had that happen once and it was my turn signal lever assembly. If I lifted the lever alittle the turn signal/brake light would work.