2001 Toyota Tundra Trailer Lights Not Working

Discussion Starter 1 Feb 21 2007.

2001 toyota tundra trailer lights not working. Turn signals not working Toyota Tundra 2000. My 2006 Tundra tail lights running lights are not working. Ground is good and parking lights and trailer brakes work fine.

The brake lights work reverse and signal work just fine just not the tail lights when I turn the headlight switch on. I have 2008 tundra with no trailer park lights. 2005 Toyota Tundra.

When I press the brake the tail light lights up but not the 3rd brake light. Issue was a blown 30A fuse on the Tow Tail circuit which was not obvious to find on the circuit map as the Tow fuses are a bit spread out in the fuse block. No running light but signals and brakes worked fine.

The trailer lights stopped working. I believe the reason the fuse blew was some corrosion I found in the wiring harness extension that is tucked into the tongue of the trailer. Disconnect your trailer but leave the cable hooked up and see if your lights work.

Toyota Tundra Forum. This is the first time I have come across this. It is not the trailer as verified it worked with another toyota.

Brake lights and indicator lights work fine. Interestingly I bought a lcd tester that you plug into the 4 pin connection it worked. Hazards work only when lights are off.