Question about 2003 Ford F Super Duty Chassis Cab

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Where is location of wiring harness for elect brake control on 2003 f550 coachmen rv

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6ya6ya
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Posted on Jan 02, 2017

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chiquititas
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SOURCE: Electric brake wiring harness

its behind the emergancy brake.

Posted on Jun 25, 2008

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SOURCE: is there a wiring harness for the trailer brake

most new trailer brake units dont splice into the lines anymore they have vehicle specific plug that connects in line with brake harness under dash or under hood

Posted on Oct 24, 2009

  • 312 Answers

SOURCE: I need to wire an electric brake controller in my truck

you can either wire it straight or gm makes a connector that plugs into the drivers side floor . theres a box down there that has a cover over it and the gm connector plugs straight to it. but be careful because i have seen several times were gm wired it wrong the stop light plug is in the wrong spot.take a test light to ground touch each connector while pressing and releasing brake pedal the one that lights the light, is your stop light look on there connector and check to see if that plug is going to the red wire if not move the red wire to that spot. as for wiring it you have to do it this way. black wire goes to constent hot, white wire goes to constent ground , blue wire goes back to your trailer plug for your electric brake, and red wire as you know by now goes to the stop light.

Posted on Dec 27, 2009

pops296
  • 174 Answers

SOURCE: I need a wiring diagram for an elect brake box

Try http://www.etrailer.com/faq-wiring.aspx.

Posted on Jan 29, 2010

  • 137 Answers

SOURCE: I have a ford F550, neither turn signal light will

Probably a bad turn signal flasher. If you replace that and they still don't work, then it'll be the switch.

Posted on Sep 30, 2010

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1 Answer

Wire trailer brake controler on ford pickup


There usually is an open harness plug under the dash. When you buy a brake controller, the instructions should come with it. The better units will have a pigtail which will plug right into the other half of the open harness plug.

If the kit you have has the pigtail connector, but loose wires needing to be connected, see if the color of the wires match those on the open connector. Then match the color of each wire.

Some years of trucks will have a heavy duty flasher to install in the Powerbox to accommodate the extra trailer lights.

Mar 02, 2015 | Ford Cars & Trucks

1 Answer

Ford f550 brake lights and tail lights, only the passenger side works, driver side doesn't from cab back. The running lights work but no turn, no brake light.


Trace the wiring harness and pull apart the multi plugs to check for corrosion. Check the ground wires have a good clean ground, clean to metal and grease afterwards. Do the hazard flashers work all corners? If not check the flasher unit.

Jul 21, 2014 | Cars & Trucks

2 Answers

I have a 2005 ford f550 with factory brake controler & factory trailer wire plug. On the trailer wiring plug I am not getting power to the turn signals or brake lights. The turn signals and brake...


There is a fuse box under the hood that has the fuses that control the wire harness. There are at least 2 boxes, mine were on the drivers side wheel well near the rear of the engine compartment.

Nov 14, 2013 | 1997 Ford F150 Regular Cab

1 Answer

Driving a 2001 f550 ! my problem is i have no brake lights ! i have replaced the brake pedal switch and checked fuses there good ! need some tips on were to start ?


Their should be a brake relay near the brake pedal switch.... check to make sure you don't hear a "click" when you hit the brake pedal....a "click" on a relay generally means it has gone bad and just simply needs to be replaced......that isn't the case then...

Check the wiring harness that leads to the back of the truck from at the switch and at the bed of the truck to make sure the wires are intact and the contacts from wiring harness one and wiring harness two are attached and not covered in a thin film of dirt, grease, etc.

May 03, 2010 | 2001 Ford Super Duty F 450

2 Answers

No left turn or brake light on left for trailer truck works fine. No current in trailer plug wire


There are separate fuses for the trailer turn signals.Make sure they are good.They are in the under hood fuse block.If they are then check for corrosion in the trailer harness wiring.Hope this helps.Good luck.

Mar 10, 2010 | 2003 Chevrolet Silverado 2500HD

1 Answer

I'm trying to install a Tekonsha trailer brakes and need the wiring diagram


The controller should have wiring diagrams with it. Also try http://www.etrailer.com/faq-wiring.aspx. The truck should have a harness that plugs into the factory harness under the dash. The harness paperwork will describe where it plugs into and what wires go where along with fuse location. If you don't hav the harness, you can get it from the dealer or the site listed above.

Feb 03, 2010 | 2003 GMC Sierra 2500HD

1 Answer

Need help installing electric trailer brake controller


easiest way is to also buy the wiring adapter almost all elect brake units sell a vehicle specific wire harness that u unplug brake wire harness plug in other harness than plug in brake harness and just connect the wires to elect brake controller eliminates cutting and splicing ur brake harness about $18

Oct 25, 2009 | 1999 GMC Savana

2 Answers

Is there a wiring harness for the trailer brake control to be wired into from the factory If so what are the color codes and where do I find these wires If not do i have to wire these to the plug myself....


most new trailer brake units dont splice into the lines anymore they have vehicle specific plug that connects in line with brake harness under dash or under hood

Oct 24, 2009 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

Trying to connect a teekonsha voyager brake control to a 2003 expedition


Their should be a 6 pin conector that only 4 pins are used somtimes a 5th wire is installed for illumination, don't worrie about using that one. The connector is located in one or two different spots, the most popular place is under the dash on the drivers side just below the steering column the connector is grey. The colors are black or red / blue / green / white and sometimes a small black or brown wire is for illumination, don't worrie about that wire. Their are wiring harnasses for sell to hook the brake control through the conector, but if you do not want to buy an adapter hook the wires as followed: Vehicle Brake Control
Black or Red Black
Blue Blue
Green Red
White White
Black is power in to the brake control
Blue is the trailer brake feed
Green is brake signal
White is Ground for the brake control

May 31, 2009 | 2003 Ford Expedition

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