Anyone know what the problem could be? bulbs and fuse are working since they work when i push the trailer brake button

 

Brake light switch most likely.

 

Yeah, that seems to be the only thing that makes sense. Good ol idi's. it cost $5 to replace.

Thanks for the help.

 

Nope. Went to o'reillys, switch the part. Still only trailer brakes. Any ideas?

 

I had this same problem. In my case, it turned out that the wires had gotten the insulation stripped off under the steering wheel. shorted out. I pulled off the steering wheel and wrapped electrical tape around bare wire. Problem solved.

 

I was afraid it would be the harness. Again. I shorted out brake lights and right turn signal about 2 weeks ago. Hired a local mechanic that Ive used before. They replaced the harness that comes with the turn signal cam.

It was working for a day. Now its not. At leas the turn signals work now. But brakes and emergency lights dont, so its a problem. Anyway, im gonna call them back. Harness wires scare me, too complicated for me, for now.

 

Do you have power to the brake light switch?

Have you checked ALL fuses? Since you mentioned the emergency flashers as well, and given the brake lights go through the multifunction switch, have you checked the MF switch?

 

I think so. The trailer brake light is also wired to the switch and it works.

Where is the MF switch?

 

It was the fuse after all. Didn't bother to check it again since I checked it 2days prior. The manual says it should be a 15amp, but since a 15amp blew, should I just add a 20amp? Is there a downside to adding a 20amp fuse on what should be less?

 

it's no problem to use the 20 ..

try that first .. it might have just blown ..

 

Never, Ever, EVER use a higher-rated fuse to address a fuse blowing. The fuse blows for a reason. And it blows in order to protect the circuit. Installing a higer-rated fuse defeats that purpose. If you haven't fixed whatever blew the fuse, the 20A fuse will likely blow as well, but you run the risk of doing damage to something on that circuit before it blows.

Which fuse blew? The safe way to troubleshoot it is to disconnect all loads energized by that fuse, then install a fresh fuse. If it blows right away, you have a short in the wiring you have to track down. If it doesn't, start reconnecting loads one at a time, until the fuse blows. That load will be the prime suspect.

The MF switch is right where you use it, behind the steering wheel.

 

I replaced the fuse and have driven about 30miles. Lights are working fine for now. I recently had my turn signal harness replaced by some local mechanics. Maybe in the process it blew (it was fine before). I used a 15amp fuse again. If it blows again, I'll disconnect the brake lights and emergency lights. And take it from there. I really hope it doesn't blow. Electrical is stressful... Plus I paid $400 for the harness replacement with labor. That would be the most stressful part of all this hehe