Electrical


#1

I have a 1989 Ford F-150 truck and I’ve noticed that the right rear brake light and turn signal is not working, but the tail light is. I changed the bulbs, thinking that was the problem, but this did not correct the problem. I just had the transmission worked on and I was wondering if the mechanic might have knicked a wire. What should I try?


#2

A first step would be to examine the socket for heavy rust or corrosion. Then test the contact point with a voltmeter to ensure it is delivering +12v. If OK, next trace the ground.

I seriously doubt the transmission work is any any way responsible for this problem.


#3

How did the electrical contact in the bulb socket look like? can you test for the presence of voltage at the contact point (test light,multimeter).

I would not think the trans work is related but you can get under there and look.


#4

If the contacts in the socket are ok then the flasher unit is most likely the trouble. The brake light circuit runs through that also.