hillstrubl
Founding Member
Ever since I got my 110 about a year ago, the rear fog hasn't worked. I never looked into it until today when I assumed it was just a bad bulb. When I pulled the lens cover the bulb was fine and the connection surfaces were good enough. Here's where I'm confused.
A test light illuminates if:
a) the running lights are on
b) I connect the black wire to a known good ground (pin 3 on my 7-pin euro trailer plug)
The rear fog switch's position doesn't seem to matter and if it is switched on (along with running lights) If I bridge the red/orange + black wires, no test light.
Is it possible that the running light is providing current via black, and the red/orange is actually the ground (and is bad)? Maybe that means the rear fog switch is bad too?
A test light illuminates if:
a) the running lights are on
b) I connect the black wire to a known good ground (pin 3 on my 7-pin euro trailer plug)
The rear fog switch's position doesn't seem to matter and if it is switched on (along with running lights) If I bridge the red/orange + black wires, no test light.
Is it possible that the running light is providing current via black, and the red/orange is actually the ground (and is bad)? Maybe that means the rear fog switch is bad too?