Electrical light problem - Fiberglass RV

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Old 11-11-2011, 03:59 PM   #1
Junior Member
Name: Ralph
Trailer: currently shopping for Scamp
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Question Electrical light problem

I am looking for some help with an electrical proublem. I hAVE A 1985 16' Scamp w/side bathroom. I had to replace th 12 Volt lioght on the side of the cabnet on thr stove side of our trailer facing the back bed. I removed the wire nuts from the light and the wires got mixed up. There is a white and black wire coming into the cabnet up the wall along side the window and 2 black wires going along the front edge of the cabnet tword the front of the trailer. The white and black wires can,t be pos. and neg. because they don,t have any voltage between them. All the power cnverter circuts have 12 volts. None of the 12 volt lights or the pump work on the trailer. When you turn the light on the side of the closit on the front amber marker lights go on but the light on the closit doesn't go on. Please help me if you can. R Schwerin Email rschwerin@wi.rr.com

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Old 11-11-2011, 04:14 PM   #2
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Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
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Marker lights are on a separate circuit connected to your tow vehicle only and should not turn on when you turn on the closit lite.

Sounds like your converter is not making 12VDC to the right circuit or you have a bad switch in the converter or a blown fuse. Do you have a battery installed?

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Old 11-11-2011, 05:45 PM   #3
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Name: Dennis
Trailer: Scamp 16'
Posts: 258
Quick review sounds like you have a bad ground somewhere. Start with your converter, making sure each circuit has power, then move out from there checking each fixture for 12v. Since nothing has power, it's probably the ground from the converter somewhere. Use a test light hooked to a good ground and try it on each circuit.
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Old 11-11-2011, 05:58 PM   #4
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Name: Dan
Trailer: Scamp
Posts: 621
When strange things happen on a 12 volt DC electrical system, rule number 1 is to check your grounds. All of them. Even the ones you don't know exist.

When your grounds are perfect, start troubleshooting other power problems.

Also, the black wire is unlikely to be negative.

-- Dan Meyer
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