Trouble shooting a passing lamp

[Clint]

I have a passing lamp on my '93 Heritage that works intermittently. What would be the best way to trouble shoot it? I can use an ohm meter or a simple test light, what should I look for?
The wiring diagram shows a hot lead and a ground.

Thanks!

 

[glider]

The ground is in the housing of the lamp. Use a test light and trace backwards from the socket wiggling the wires as you test.

 

[Clint]

Perfect! I'll give it a whirl this evening.

Thanks!

 

[Clint]

I finally had some time today to work on the passing lamp. I had no pwr to the unit on either side. I traced it back to the supply wire that feeds the two lines out to the units. The wire connector that divides into two had loose connections, once replaced, I had good lights again!

Thanks Glider!

 

[glider]

Glad you found the problem, they can be elusive at times.