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2002 ford f-150 7-pin hitch wiring problem. There is no power to the accessory pin but everything else works fine with the other trailer connections.

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Check fuse allso ford trailor package relay #2

Posted on Jul 30, 2009

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I have a 2002 ford expedition that has a problem with the turn signals. when you turn on the right signal it works properly, but when you turn on the left signal both signals on the back of the vehicle...


Get a wiring diagram from the Free portion of the Autozone site. It is a little work to separate the Help categories at the bottom of their Webpage.

I have heard of SOME 4-way flashers that are built into the turn stalks causing problems. The contact pins for the turn signals are shared as 4-way flasher pins. Try clicking the 4-way flashers off/on about 20 times and then use the left turn signal. It has been known to reseat the contact pins.

The wiring diagram I mentioned would show where the tailgate top light gets its power. One feed should go to the brake light switch for the brakes and another feed should be the flasher feed.

As I see it, you have 2 extra lights going on when you use the left turn signal. Those 2 lights are the tailgate light and right turn signal. The wiring diagram should show the places where the wires are close enough to cross. I am thinking the 4-way flasher is the only place where the top tailgate light gets flasher power; the rest of the time the tailgate light is a Brake light.

I do not want to spend your money on an unnecessary turnstalk and that is why I say to look at a wiring diagram and see if there is anyplace where the wires could cross.

Last, trailer hitch plug. All wires are bundled with left turn, right turn, and brake light in the trailer hitch plug. Corrosion could connect the terminals.

Would like to know what you found.

Oct 08, 2013 | 2002 Ford Expedition

1 Answer

I have a 96 ford explorer xlt with a hidden hitch. the 7 pin rv connector is not working. i found where the wires from vehicle connect to 7 pin connector and one wire was caroded at the crimp black wire...


Yes, you need the other wires to provide the trailer with battery voltage. If the trailer has trailer brakes, you should have an RV mechanic wire up the connector so the brakes on the trailer operate from the Ford.

Mar 11, 2011 | Ford Explorer Cars & Trucks

1 Answer

Hi, we recently bought a 2010 Honda odyssey and ha...


is the trailer attached to the ball on the van?? could be a ground problem,,run a jumper from hitch to trailer see if that works,,

May 21, 2010 | Cars & Trucks

1 Answer

Were do you hook up the two wires under the hood for trailer brakes on a 2000 silverado


Sometime around 2000, GM started putting trailering pre-wire harnesses in the vehicle. Your truck may have this harness built in and would greatly simplify brake controller installation. Look under the glovebox and see if there is a wire harness tied off. There will be four wires in this harness, which should be run over to the steering column to use it. Most trailer brake controllers are compatible with this harness.
The four wires in the harness are: Red, 12vdc; black, ground; blue or purple, brake pedal; and brown or white, trailer brake wire to seven pin, four pin, or five pin connector at trailer hitch, if your truck came from the factory with a trailer hitch.
If you are adding the hitch and do not have the four wire harness, the under hood wires from your brake controller are Red, connect to one of the studs under the distribution box cover (the distribution box is on the driver's side against the firewall. Underneath the cover are two large threaded studs which are hot from the battery all the time); and the other wire from your brake controller would have to be run the length of the truck along the frame, tied off in several places, to the trailer hitch connector on the bumper. Follow the directions that came with trailer hitch wiring connector to connect this wire to the proper pin in the connector.
If this has helped you, great, and please remember to vote/comment.
Good luck!

Feb 21, 2010 | 2000 Chevrolet Silverado 1500

2 Answers

I have one 'pin' not getting voltage for my trailor hook up


you can go into an auto zone and on the package is a diagram, they will usually let you write the info you need.

what wire is showing, i know yellow and green are turn and white ground and brown are running lights. so you will get no power to the white but it has to be grounded, or no lights either, sometimes the connections go bad. truck side and trailer side.

also there is a quick connect for your truck if it is the 150, so much easier and not tracking wires down

It does not take long for a connection to co bad, my race trailer had a little deamon in it, had to rewire the thing about 3 to 4 times a year, all new stuff, it just hated the trailer

May 26, 2009 | 2001 Ford F150 Styleside SuperCrew

3 Answers

Wiring for a trailer


u must install the fuses for the system in he underhood heavy duty fuse box, it will be marked trailer tow

Mar 17, 2009 | 2006 Ford Escape

6 Answers

Trailer wiring for 2005 Ford Escape without factory tow package


I had the sam problem with my '02 escape when I installed the hitch. I changed the turn signal relay under the dashboard on the drivers side of the dash with one from an escape that had a tow package(one was blue and the other was yellow...). worked fine for me after that. Don't know if it changed later...

Oct 17, 2008 | 2005 Ford Escape

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