Very awkward tail light issue
#1
Very awkward tail light issue
So, I have run into a very confusing issue with my tail lights on my 91 f150.
Details:
-all running lights work
-all blinkers work
-right brake light works
-left brake light does not flash when flashers are turned on
-left brake light does not work when brake pedal is depressed
-all bulbs are good
-I have inspected the wiring and I don't see any breaks or anything
AND THE CRAZY PART... When I have the brake pedal depressed and I turn on the right blinker the left brake light works, but only when the right blinker is on.
I am stumped. Please help
Details:
-all running lights work
-all blinkers work
-right brake light works
-left brake light does not flash when flashers are turned on
-left brake light does not work when brake pedal is depressed
-all bulbs are good
-I have inspected the wiring and I don't see any breaks or anything
AND THE CRAZY PART... When I have the brake pedal depressed and I turn on the right blinker the left brake light works, but only when the right blinker is on.
I am stumped. Please help
#2
Senior Member
The brake light circuits go through the turn signal switch. Thats most likely your problem.
#3
Ya, that's what I was thinking after doing some research on the forum. Is the turn signal switch the same as the multi function switch? The unit in the steering column with the hazard switch?
#4
Senior Member
Yes
#5
Nearly identical problem here.
I know this is an old thread but I have a similar issue.
Running lights all work
Signals all work
Passenger side Brake doesn't work
Passenger side Hazard doesn't work
No possibility of bad bulbs
Weird part: When I press the brake and check the tail light socket with a meter I get GOOD VOLTAGE. Also when I test the hazards voltage is good. (Same wire -- orange with blue stripe, and same filament in the two way bulb.)
I pulled out the wiring harness from where it "Ys" and you hook up trailer lights to both tail light sockets. No obvious visual problems and no obvious problems with the meter.
Feeling stuck. . .
Any luck with the original poster's problem?
Running lights all work
Signals all work
Passenger side Brake doesn't work
Passenger side Hazard doesn't work
No possibility of bad bulbs
Weird part: When I press the brake and check the tail light socket with a meter I get GOOD VOLTAGE. Also when I test the hazards voltage is good. (Same wire -- orange with blue stripe, and same filament in the two way bulb.)
I pulled out the wiring harness from where it "Ys" and you hook up trailer lights to both tail light sockets. No obvious visual problems and no obvious problems with the meter.
Feeling stuck. . .
Any luck with the original poster's problem?