Have a 1998 f-150 factory tow plug 4 wire plug the brake and turnsignals work on truck but not on plug

I don\'t think it has wiring provided in the factory for the tow package either. Looking at the schematics, they appear to be different with no provision for connections. The aftermarket have a wide variety of tow packages available which are simple enough to install if you ability.

Threr is one which you have to drill a large hole in the rear bumper to fit the receiving end of the connector. This is designed so that a wide selection of adaptors can be plugged into it. The adaptors are designed to fit the fixture in the bumper and the other end is shaped to plug into what ever connector you are towing. You will find this knid of fixture on nearly any factory package.. (NO WIRES DANGLING UNDER THE VEHICLE.) additionally, when not in use, there is a spring loaded cover which closes over the fixture to keep contaminants from entering Although I am a Nissan Master techniton, I chose a long wheel base 1 ton long wheel base cab and chassis Toyota with a 3.0 V-6 which I opened the back of the cab and installed a sleeper. Then built a flatbed with removable sides. I use this to pull my Nissan 300Z race Car. I have one of these fixtures on my truck because I don\'t always use the same trailer and the connectors to the trailer for the lights and electric brakes are different. The kits come with a controler for the electric brakes which you can mount where ever you wish and the controller has adjustments to control sensitivity of the trailer brakes so you can adjust the trailer to stop with the truck about the same time instead of wearing out your brakes from the extra load. With my Toyota loades with an extra engine, transmission and diff. Air compressor. Generator. Tool box, pop up tent, oils and other fluids and other misc Items. Between the trailer, the truck and it\'s load it grosses out at 11,800 lbs.When we go to Texas world speed way, we take 45 south where where there are very few cops. We cruise at 80-85 mph in the truck without a problem If the trailer brakes don\'t work, it would take me a significant time to stop because my truck is rated for 9,500 lbs.I run the living piss out of it and it has given me no problems at all/Hmm How did I get on the subject of my Toyota flatbed? OH, it\'s because I use the trailer brake setup I described which has been flawless. There are places that specialize in selling truck accesories only. From camper top and wheels to a variety of tow packages.Check them out. Good luck..

sure, why not look that up in the FSM.?
why not say which function fails.
park, turns, brake? backup (all 4?) (check ground #5)
after market wire job or factory tow package?
we cant guess any of that.

you can see all the orig. wiring here.
ZJ, click that and 8w wiring chapter.
and see it all, every inch of wire in car."STOCK"
stock means, as it left the factory Day 1.

I looked and didnt see a tow option in the FSM. 1998.
but didnt read every page.

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.

some van don t have a ground wire. hook up to trailer put jumper cables to frame of trailer and van if works install a ground wire plug

Fix your car right away by clicking the link I attached
Dodge

Most likely the brown wire from the trailer connector is connected to a constant battery voltage source, and it should be connected to the vehicle running light circuit, however someone might have wired the trailer connector up that way on purpose so that the trailer does not draw power from the vehicle running lights and possibly damage the vehicle running light circuit. (Dodge/Chrysler vehicles do have delicate lighting systems) Here are some images to help assist you, and the 4 way connector is the same as the 5 way connector just without the blue wire for the trailer brakes.

With 4 prong and 3 extra, that will give you what you need for 7 prong for towing RV. If your not too experienced in that area, a mechanic at any trailer place, or hitch installation place or who knows RV wiring, should be able to do it for you in about 1/2 hr. or less. Testing the wires from your truck for what they do as in right , left, stop, running/taillights, etc is about the hardest part, and the 7 prong usually comes with what terminal does what.

Check max fuses under the hood

so, the trailer has no brake lights, or turn signals, just tail lights? Everything (all lights) on truck work ok? What do you have for trailer wiring hook up 4, 5, 6, or 7 way? There is no fuse, the lights all work off the tow vehicle lights, so if the tow vehicle lights all work properly, it's probably a wiring problem, such as bad grounds, loose connections, etc. Get a volt meter and check voltage at truck plug to see if power is getting that far. If truck plug in is ok, wiring problem is the trailer. Make sure all grounds are tight and rust free, that's a common problem.

check for a short it could be anywhere in the line