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Wayne, RV Mechanic
Category: RV
Satisfied Customers: 8284
Experience:  Work on several type of Rv engine, Trans, brakes
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Looking at an Rv to buy. All the 12v bulbs were out. The

Customer Question

Looking at an Rv to buy. All the 12v bulbs were out. The output to the lights, below the fuse is good, 12v. But at the lights and at the wall switches I cannot get power. I believe the positive side is good,but the ground side is broken. Any ideas for testing with a jury rigged wire? I don't have an ohm meter nor do I know how to use one
JA: Just to clarify, what are the exact lights you're talking about?
Customer: They are an old fashion double 12v with an on of slider switch between the two lights, as well as an on off switch at the wall. They use a single filament bulb similar to a tail light bulb
JA: What is the model/year of your RV?
Customer: It is a horse trailer living quarters made by Duster Camper, Mac Greagor Texas, now out of business
JA: What year is your Duster?
Customer: 2001 year model
JA: Are you fixing your Duster yourself? What have you tried so far?
Customer: In order, Replaces bulbs,
Cleaned bulb housing, checked output in this circuit in the fuse panel,that is good, then took one of the fixtures out of the ceiling, wiring is good on it, removed the wall switch, wiring intact there , but no electric to the switch that I can find
JA: Anything else you want the mechanic to know before I connect you?
Customer: No,, just help figuring this out
Submitted: 22 days ago.
Category: RV
Expert:  Wayne replied 21 days ago.

Hi I'm Wayne

I will help you with this

yes jun a jumper wire fron the side of the bulb socket

to a good know ground ,if it lights then you know ground side is not working

I hope this helped you

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