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Old 05-25-2016, 02:15 PM   #5
blw2
Senior Member
 
Brand: Thor Motor Coach
Model: 2013 31L
State: Florida
Posts: 2,183
THOR #908
I had issue on mine, with the type of fixtures used, actually hold moisture inside.
here was a thread on it.
http://www.thorforums.com/forums/f8/...oblem-840.html

Looks like the pictures might be removed though....
here is a picture of the type I have
https://goo.gl/photos/nD2xgaGorfJLcCE96
and with the lens off
https://goo.gl/photos/cH5g1DCZrZ4MAqh48
and the shotty gasket
https://goo.gl/photos/BAZyKBNwKjoowSdy9

I assume yours are the same type....

Anyway, these are mounted on the thin FRP sheet of the nose, and not grounded to structure. I don't recall exactly the wiring layout off hand, but as I recall they connect daisy-chain fashion, i think it was over to the driver's side, where it finally dived down into the coach to the control switch and power..... simply two wires form each socket feeding through a small hole under each fixture, to a splice connection..... as I recall.

I would suspect
1st a corroded socket
2nd a corroded connection in or under the socket
3rd potentially a loose/bad connection in one of these lights, in the daisy chain circuit

I suggest that if it's not in the sockets themselves
look carefully for a way to pull down the ceiling panel. I'm thinking it would be much easier to troubleshoot from inside, where I'm guessing you can see all connections and wires at once....

I never did find what I felt was a sufficient alternative to these fixtures, so i ended up replacing my original ones with the same type, and sealed them best I could. I'm past due getting up on the roof to inspect and maintain....

I'm still figuring that I'll replace them with some sealed LED's some day if they every give me problems again.
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