76 FJ55 one brake light not working

[Feverdat]

Trying to get all the lights in working order and I can't figure out why only one brake light works. I changed the bulbs. Both rear taillights and turn signals work, but only the left brake lights work. I have a wiring diagram, but can't figure it out.

Thanks for any assistance.

 

[Feverdat]

TTT. Hoping to get some help with this.

 

[LAMBCRUSHER]

Check the grounds..alot of the light grounds were via a mounting screw...alot of those have become corroded or at least have built up their resistance...I had to add ground jumpers to my front fender buckets. use your volt meter to determine that you have 12 volts + at the socket, then try to find your ground...

 

[LAMBCRUSHER]

Have you been here > https://forum.ih8mud.com/forums/fj55-iron-pig-preservation-society.51/ ?

 

[Feverdat]

Thanks for the reply. I had to add ground wires to my front turn signals as well. I did the same to the right rear, but it didn't help. I have (had) no brake light power to the light, only tail light and turn signal. I ended up tracing it down to a bad turn signal switch. I put a spare one in and everything works perfectly. I guess the brake lights get there power through the turn signal switch.