Beau Jenkins (72.86.115.164) - Thu May 22 01:13:31 2008

Vehicle came with factory "4-flat" trailer wiring harness connector, right turn signal does not work at connector. Checked for power coming into connector-found none. Attempting to trace back wire to factory trailer wiring "tie in" point. Cannot locate junction of wires. Need help locating this point.

Tested two (2) major plugs on frame, under vehicle on driver's side midway of frame. When those plugs disconnected, no effect found at rear right lamp.

Right rear "vehicle" turn lamp functions fine, just not at trailer connection????

Request factory trailer connection tie-in point.

B. Jenkins

Reply #1 KIle (64.170.19.202) - Fri May 30 16:55:39 2008

the trailer wiring (turn signals are on a seperate line than the vehicle signals. It sounds like the fuse for the trailer line is popped. Check under the hood in the fuse panel for a blown 10-15 amp litle fuse. that should do it.

Reply #2 Tony (216.68.51.2) - Sun Jun 22 17:48:22 2008

My green wire is also dead... 2000 ford ranger. has always been so. is this a ford defect? anyone know the answer yet?

Reply #3 Izen Lingenfelter (64.179.113.75) - Mon Jul 14 13:40:26 2008

I am having trouble connecting my harness to the factory plug and getting power. I checked where the factory harness is and there is no power. i checked the fuses and found 3 fuses. one for the brake lights, one for right and one for left turn signal. i checked there and found that the brake fuse area has power but niether of the turn signal fuse plug is getting power. any suggestions

Reply #4 John Morris (24.117.107.38) - Mon Jul 14 19:00:02 2008

Guys, you have a style of t/signal switch that is notorous for going out, so if your t/s lights are working and you're trying to hook up trlr wires just install saddleback wiring connectors and wire pig tails and connect them to your trlr light harness and remember, always hook up all 4 wires. 1 goes to R, 1 goes to L, 1 goes to Tail Lights and the other wire goes to ground.

All turn signal lights have 2 wires going to them and one is always ground. Same with the tail lights. The body of the vehicle is always the ground point, so@@@ with the switch on and either t/signal on hook up the trailer light on that side then switch the other side on to hook them up.

Then shut them off the t/s and turn on the tail lights so you can hook them up. And Black is always GROUND...

The color of the trlr hook up wires you use in any position doesn't really matter just so you use the black for the ground. A last note: If your wire harness doesn't have 4 wires just make sure to hook up a ground wire from the frame to the trailer hitch or trailer so you can get a decent groung thru the metal. Don't put grease on the hitch if you want a good ground with no ground wire connected...

Reply #5 Johnny (216.239.87.143) - Mon Jul 14 23:14:45 2008

THE GEM ISOLATES TURN AND STOP SIGNALS FROM THE OEM TRAILER CONNECTION! STOP SNIFFING THE HARNESS; Generic Electronic Module varies in location, my 1999 is on left rear fender.

Yes , separate Grounds are a "feature of the Ford trucks!

The ball hitch is not a good substitute for a good chassis connection which you should be able to make just about anywhere

at the rear of the Explorer.

Reply #6 Kenny (66.210.194.98) - Mon Jul 28 14:29:14 2008

I'm trying to wire my 2000 for Explorer with a 4 wire trailer harnes but can't seem to get the headlights and brake lights working. I can get one or the other but when I try to hook them up to work together, the headlights come on when I hit the brake. there appears to be a sepeerate wire for the headlights and brake lights on the Explorer. The wire colors don't match the 4 wire wiring diagrams I have.

Any idea as to how to wire this thing?

Reply #7 tom (64.12.117.68) - Wed Sep 3 22:36:29 2008

i'am haveing the same trouble but they did work

Reply #8 Dan (64.12.117.68) - Sun Sep 21 12:15:07 2008

Have a 97 Explorer. Rewired an old snowmobile trailer. All connections on the trailer are good. When I plug into the jack on the Explorer I have taillights and turn signals however when the brakes are applied all the lights on the trailer go off. What is going on? The Explorer has the factory harness that comes with it.

Reply #9 Geo H (76.179.183.139) - Tue Sep 30 11:17:31 2008

Problem is that the ranger has separate dir lites and brake lights. the trailer doesn't on the plug of the truck has 1 ground , 2tail lights, 3-4 right and left dir. This is so the lights will work with any trailer. If you get the diagram from ford in there EVTM you will find the problem. G

Reply #10 Chuck Hankins (206.125.156.211) - Fri Oct 31 15:47:05 2008

I'm trying to connect a "wire-in" trailer hitch wiring kit to my 2001 Windstar. Have colors of the kit with the converter, but no idea what the colors of the vehicle wires are. When I attach the kit wires, what color vehicle wires do I plug into?

Reply #11 mike (24.187.59.224) - Sat Nov 29 16:01:15 2008

trying to install a brake controller in 2008 ford explore .Have wiring for in car and found factory plug but where do i find the other wires needed in the rear ? vehicle is factory equiped with a flat 4 can anyone help

Reply #12 Rick (74.166.70.63) - Wed Dec 17 18:28:44 2008

Have a 2005 ford f 150 with towing package, my left brake and turn signal on camper quit working...checked harness seems ok. It seems no power coming from tow package connector for left turn and brake light. Checked with multi meter nothing....Please help

Reply #13 Bob (97.104.180.30) - Thu Jan 1 19:04:40 2009

I'm not getting power from my my power supply cord that is factory installed. I bought a trailer kit from an auto supply store. All fuses are good but none of the lights work. What's my sequence of checks and/or changes I need to do. Thanks for any help from anybody.

Reply #14 chuck (68.74.117.28) - Sat Jan 17 19:28:15 2009

I had a uhaul tow light package installed a few months ago..Recently rear running lights do not work but signals and brakes do. Check bulbs all work and tested ok, A few weeks ago my right tail lights were stuck on so I pulled the hitch fuse at the battery, then the rear running lights stopped working? Replaced fuse and they still are not working. checked main fuse for rear lights is ok. not sure what is going on but I think Uhaul light switch has something to do w it.

Reply #15 Paul Gallardo (65.223.31.226) - Wed Feb 4 12:47:17 2009

I have a 2004 ford f-150 I was changing out a light wire on my horse trailer and went to ground, sorting out my running light on the trail. I still have brakes and blinkers. I have no power to my trailer plug for my running lights. I do have all my function on the truck itself, except back up lights. I checked all the fuses in the fuse box. Is there another place they keep fuses, maybe some place under the hood ECT. I have looked under the hood for an additional fuse location and I cant seem to find one.

Reply #16 Shannon (71.220.232.126) - Mon Feb 16 17:20:51 2009

where should I hook up my ground strap and why does my back wiper run no matter whether they are turned on or off?

Reply #17 bob lostracco (98.198.108.220) - Mon Mar 23 17:04:10 2009

I have a 2001 explorer sport.Both turn signals work on the vehicle..both trailer lights work fine tested on another vehicle ..but when I plug the trailer into the vehicle's 4 flat plug , trailer right side turn signal no work.

help

Reply #18 Jason (72.204.40.56) - Fri May 22 00:52:32 2009

I have a F-150 and recently got a boat and trailer. I put some new lights on the trailer and when i plugged everything in the running lights worked and i got the blinkers to work but when i applied the brakes the lights went out except when i had a blinker on. I bought a new wiring harness for the trailer and hooked up everything to the correct wires and now the running lights still work but when i turn on either blinker both blinker lights go off at the same time, also the lights still go off when i apply the brakes.

Anyone have any idea what i might be doing wrong?

Reply #19 James Alber (76.226.2.68) - Mon Jul 13 14:10:31 2009

I have a 1999 Ford Explorer Sport. The vehicle was hit in the rear a few years ago (minimal damage), and was taken to a local dealership where the rear bumper was replaced. When they replaced the bumper, however, they removed the 4-wire trailer plug and part of the harness. My father in law rewired the vehicle for a trailer. The tail lights and turn signal lights work, but when you press the brakes, the tail lights go out and the brake lights do not work. I have checked the wiring to the trailer and everything seems fine. I did notice on the Explorer that there are 4 wires, yellow, green, brown and black. All of the wires on the trailer plug correspond to the wires on the truck except that the black wire on the truck is connected to the white wire, or ground wire on the trailer plug. Is this black wire supposed to be a ground or is it a separate wire for the brakes?

Thanks!

Reply #20 joe (216.220.216.162) - Thu Nov 12 17:21:31 2009

I'm having the same problem sort of. I need to know what the 4 wires function are coming off the trailer connection of my 02 Explorer.

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