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Factory 7-Wire Trailer Connection Problem

8 messages,  Last post on Jun 10, 2009 at 3:23 PM

You are in the Ford Expedition Forum.

What is this discussion about? Ford Expedition, Towing, SUV

Messages Page 2 of 2

#4 of 8 Joe by alwaysfords2

Jun 08, 2009 (9:57 am)

I just looked up the wiring diagram for a 7 pin trailer. There is no seperate brake wires as you pointed out. A separate run for each blinker/stop combination.
 
Are you sure the loose wire isn't a ground or something?A bad ground will throw a lot of stuff off.
 
Take a look, maybe this will help you out
http://www.etrailer.com/faq_wiring.aspx

#5 of 8 Re: Joe [alwaysfords2] by buffalojoe

Jun 08, 2009 (10:31 am)

Replying to: alwaysfords2 (Jun 08, 2009 9:57 am)
That diagram is fantastic, thanks for passing it along. The more I look and think about the wiring diagrams, and the more I think about what happened, I will double-check the ground. It may not be loose in the plug but it sure might be loose somewhere else. Talking about chasing gremlins! I'll have to wait until after work to check it all out but thanks again. I'll let you know.

#6 of 8 Re: Joe [buffalojoe] by buffalojoe

Jun 10, 2009 (11:37 am)

Replying to: buffalojoe (Jun 08, 2009 10:31 am)
The problem is fixed. A fuse had blown in the circuit for the 12V charging line to the trailer battery. It didn't affect the interior lights but that was the missing link for the external lights. Once I put a new fuse in the prongs, it worked fine.

#7 of 8 Cool by alwaysfords2

Jun 10, 2009 (1:19 pm)

Quick and easy fix. Best kind.

#8 of 8 Re: Cool [alwaysfords2] by buffalojoe

Jun 10, 2009 (3:23 pm)

Replying to: alwaysfords2 (Jun 10, 2009 1:19 pm)
Thanks for your input, it was much appreciated.

Messages Page 2 of 2

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