All Things Towing Conventional, 5th Wheel, Toy Hauler, Flatbed, Gooseneck, Electrical/Brakes/etc.

7 Pin Problems??

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Nov 13, 2005 | 08:25 PM

#1

JWJ

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7 Pin Problems??

Having problems with the 7 pin on my truck. Seems the running lights (tail) have no power to the specific pin. Lights work fine on the truck. Stop, left and right turn plus electric brake are all functioning fine. Just don't have running lights. Any thoughts on problem. Having the same problem on the 7 pin on both an Explorer and F-350.. Thanks for any help you can provide...

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Old

Nov 14, 2005 | 06:06 AM

#2

Ford Truck Racer

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Joined: May 2002

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From: Claremore, Ok 74017

I would check the wiring connections. If all the lights are fine but one. Or you can test the other prongs with the running lights on and see if a wire is swapped.

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Old

Nov 14, 2005 | 08:02 AM

#3

Ultraute

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Joined: Apr 2004

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From: South TX

The factory setup uses a seperate fuse and relay for the trailer running lights (and for the backup lights too). Check that fuse and relay. Should be listed in the owners manual.

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Old

Nov 14, 2005 | 04:22 PM

#4

Lou Braun

Fleet Mechanic

Joined: Nov 2003

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From: West Cornwall, CT

Club FTE Gold Member

The fuses and relay for the trailer's running lights should be located in a fuse box under your hood (not inside the cab).

On my '95, relay 4 and fuse D power the running lights.

Lou Braun

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Old

Nov 15, 2005 | 09:14 PM

#5

cangim

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Joined: Nov 2003

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From: Utah County, UT

Quote:

Originally Posted by JWJ

Having problems with the 7 pin on my truck. Seems the running lights (tail) have no power to the specific pin. Lights work fine on the truck. Stop, left and right turn plus electric brake are all functioning fine. Just don't have running lights. Any thoughts on problem. Having the same problem on the 7 pin on both an Explorer and F-350.. Thanks for any help you can provide...

As previous noted, check the fuses on both rigs, should be 7.5A according to the book, I replaced mine with 10A when they blew. Not to increase current simply the fact that I had 10A mini fuses and did not have any 7.5A fuses. If the fuses on both rigs are in fact blown. You will want to check the trailer(s) that you have towed with both rigs. Sounds like you've got a short there some where blowing the fuses on your rigs.

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