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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: belfert on August 27, 2009, 09:36:14 AM

Title: Backup lights for a trailer?
Post by: belfert on August 27, 2009, 09:36:14 AM
I have a 7 way plug on my bus for trailers.  My brother has a trailer that I want to use, but it has backup lights, plus the backup lights disable the surge brake in reverse.  (I have no plans to ever back the trailer, but just in case.)

What pin is normally used for backup lights on a 7 way plug?  The wiring diagrams I can find for a 7 way don't show backup lights.
Title: Re: Backup lights for a trailer?
Post by: Lee Bradley on August 27, 2009, 09:45:31 AM
Here is a pretty good wiring diagram; I would use the auxiliary for B/U lights.

http://www.etrailer.com/faq-wiring.aspx (http://www.etrailer.com/faq-wiring.aspx)
Title: Re: Backup lights for a trailer?
Post by: kyle4501 on August 27, 2009, 10:09:38 AM
On my Airstream, the backup lights are the center pin.

I'd verify with a VOM first.
Title: Re: Backup lights for a trailer?
Post by: NJT 5573 on August 27, 2009, 10:56:43 AM
Brian,

You should start with your brothers trailer and a VOM or trace them out. Find out he has it wired and just do it the same on your plug so it doesn't get him swearing when he gets the trailer back.

The logical answer for this is like the guys stated, but I have seen some different aproaches to electrical more than once and if someone has it all working for them and I borrow it and wire it properly, they don't always appreciate it.

Keep your 7 accessable and you can always juggle a wire or two if you have issues later.
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