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Tractor Talk Discussion Forum

trailer lights

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Dan

02-12-2004 07:24:18




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The directional lights on a trailer hooked to my truck flash the opposit direction of the truck. They worked OK until I had a repair shop try to install an electric brake controller. I don't think the brake controller ever worked. When I returned to the shop, they said it had just blown a fuse and they fixed that. I have a 97 F150 with a trailer tow package, this should be a simple hook-up, I thought. What is wrong?

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49 Cubber!

02-12-2004 18:16:14




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 Re: trailer lights in reply to Dan, 02-12-2004 07:24:18  
On a 97 Ford you should have a plug under the dash from the factory for the brake controller!(Unless it was ordered without it ot save a few hundred bucks.ASSUMING that the controller was wired right,your trialer lights are wrong for the truck,Im guessing the shop did that since they did work right before.Alll the ywould have had to do is wire the controller to the adapter,again should have came with the truck,then put in a couple of fuses.Thats the way my 97 was!

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Jim

02-12-2004 15:27:14




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 Re: trailer lights in reply to Dan, 02-12-2004 07:24:18  
Check to make sure that you have a good ground between truck and trailer. Lack of a ground will make trailer lights do some strange things.
Jim



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John

02-12-2004 11:28:41




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 Re: trailer lights in reply to Dan, 02-12-2004 07:24:18  
Well it is a simple hook up if both are wired correctly. Did they have the trailer or are they just wiring truck off the wiring diagram.

I would take the trailer and truck to the repair shop together if that has not been done and ask that the repair correctly. The fuse could be blowing on the brakes because it is hooked up wrong. The problem with this plan is they may tell you your trailer is wired wrong and that will be a extra charge even if it is the truck.

If you want to get out a test light and see which is right you can check as it should be wired like this.

third party image

TRUCK

third party image

TRAILER

If Yours is a 5 or 6 wire just take off those.
Hope this helps.

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Ol Chief

02-17-2004 20:57:33




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 Re: Re: trailer lights in reply to John, 02-12-2004 11:28:41  
Truck-trailer plug Wiring schematic.Posted by John 02-12-2004 I have somehow lost track of this diagram.I thought I had copied it, so returned to the subject only to find on my screen two rectangular boxes which are empty except for a tiny boxed red X in the corner.This has come up on my computer on many occasions but I have never been able to access a picture from the red X.Am not a computer whiz. What gives how do I convert the X to something real.

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Red Dave

02-12-2004 08:57:20




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 Re: trailer lights in reply to Dan, 02-12-2004 07:24:18  
Sounds like the trailer wiring doesn't match the truck wiring. There is supposed to be a standard for connector pin wiring, but it seems like every trailer I ever had was different.
Did the shop have the trailer with the truck to verify everything, or did they wire it to a standard diagram? I would double check the trailer wiring against the same standard before going back to the shop to look for a refund.

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rustyfarmall

02-12-2004 07:46:49




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 Re: trailer lights in reply to Dan, 02-12-2004 07:24:18  
You are correct, that is an easy hook-up, any one with the ability to read and understand simple instructions can do it. If I were you, I would not return to this shop, except to demand a refund. You can probably remedy the problem yourself by purchasing a cheap test light, take the trailer wiring apart and switch two wires inside the connecter. Use the test light to determine which terminal has current when you turn on the right turn signal of your truck, and attach the proper wire on the trailer to that terminal, and then do the same for the left hand turn signal. I don't know about the brakes, you may need to find a reputable shop for that. Also, read the instructions that came with the brake control, and get out the owners manual for your truck, there should be a section on trailering.

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