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Old 09-28-2017, 08:38 AM   #1
jlb27537
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12vdc light problem

Hello All,

My '14 3150RL, bedroom slide, headboard area has 2 wall mounted 12vdc lights with a switch on each. (reading lights) They are powered by individual wires coming from "under" the bed slide.

The slide is powered by a BAL cable system so there is nothing under the bed except storage space.

The lights will either work, go on and off when the slide is moved, or not work at all. My thinking is there is a single feed with the 2 lights tied to this single feed and is under the slide/bed area. I removed a single fuse and both lights quit working.

Is my only option, start taking the paneling off the under bed storage area?

Thanks Jim
 
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Old 09-28-2017, 01:54 PM   #2
BuilderBob
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Yes! you need to find out were the wires move in & out with the slide there is probable a brake in the wires were it flexes when you open or close the slide it happens over time the copper gets brittle at the bend.



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Old 09-28-2017, 07:41 PM   #3
beeje
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You need to lift the bed up (I assume you have storage under it). Take the bottom panels out and have look at what is going on under there. I suspect you will find some kind of issue with the 12 volt wires being pinched somehow.
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Old 09-28-2017, 08:04 PM   #4
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You may also have a bad connection behind one of the light fixtures. You would expect the 12 volt circuit goes up to one of the lights, and then across to the other. I have had to replace connections in the 12 volt circuits a number of times due to poorly made crimps.
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Old 09-29-2017, 04:26 AM   #5
Phil P
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Hi

We had the same problem with or 2009 it turned out to be the switches.

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Old 09-29-2017, 06:53 AM   #6
jlb27537
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Thanks Guys,

After the wife got her under bed stuff out the bottom panel was removed, 4 screws and it lifted up. The problem was obvious.

The bed slide moves 23" in it's travel. The under bed frame has a 1" square board the removable bottom secures to. The 1" square piece is all but touching the carpet. There are 2 groups of wire under the bed. A 12vdc group and a 120vac feed for a plug in the side of the bed base.

The 12vdc group is/was secured to the floor 18" from the rear of the bed. The movement of the bed slide had pushed the crimped connector off the wires and then caused them to separate. Wires were re-attached, soldered, insulated and then secured to floor 26" from rear wall.

The 120vac feed uses 2 flat plastic plug in thingy's, to join the 14g wires to the movable bed slide. The one that was secured to the floor was 20" from the rear bed wall. The 1" square board had rubbed the 14/3 SO wire used at the plastic connector that the outer covering was torn and the black wire inside the SO wire had the insulation worn thru to the stranded wire inside for about a inch. The fix was to add 3' of SO wire to the existing 24" so the floor mounted plastic connector could be re-located so the SO wire can not be pinched by the bed frame when it moves.

Again we see Keystone/Montana assembly issues. Securing wiring in a position that would be in direct contact with a moving bed slide. The fix at the assy line would be to use a longer piece of SO wire, and secure the 12vdc wiring a few inches further from the rear bed wall.

So, might be a good idea to pull up the bed base and have a look-see to see if your wiring is like mine was.
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Old 09-29-2017, 07:08 PM   #7
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Don't remember where it was posted, but someone else had a similar issue where the bed would slide into the 120 volt connection point chafing the wires to the point they burnt up and shorted out. This is the reason I have gone over mine from top to bottom/front to back inspecting everything for possible issues with wires/propane lines/hydraulic lines etc. rubbing or binding. especially areas that move such as slides.
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