I’ve got a 82 c70 passport. PO installed an aftermarket tailight. Noticed the brake light wasn’t on, burnt bulb. Replaced it lights work.
No here’s my problem. the taillight I have has 3 wires. Black, red and yellow. Off the harness it’s brown & green/yellow. So I hook up.
Black to ground, brown to yellow, red to green/yellow AND nothing.
So I try red to ground, yellow to brown and black to green/yellow. I have lights, BUT when I press the brake nothing.. I did vice versa as well still when I hit the brake nothing.
I checked if I have power going to the wire when the brake pedal is press and I have power. Installed a new brake switch etc. I’m kinda lost now. At the moment I have it wired so it’s just ON.
Any help would be great.