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there is likely a wire that goes from your brake pedal switch to the trailer brake controller this wire is probably broken or not hooked up. if it is hooked up and no wires are broken I would start making sure everything is hooked up right.
If all the lights work properly with the trailer wiring not connected then the truck itself is fine. If attaching the trailer wiring causes the lights to permanently stop working on the truck then you are blowing a fuse and it will need to be replaced. Your owners manual will show you where the fuse panel is. You should be able to check the wiring plug at the back of the truck to be sure it is working properly with a test light and a helper. If the power for signals/brakes etc are not all working at the plug, then trace back and fix these. If all is good at the truck's plug, then the trailer wiring must be faulty. Again, go through it and fix anything that is broken or corroded. Of course it goes without saying, make sure all the bulbs are good.
the unit you buy will have the instructions for getting a 12 volt feed from the fuse box (never direct of the battery has to have a fuse )
the unit slide controller will be near the driver side and a 12 volt wire will run through that controller inside the car to the back of the car to the trailer plug connection matching up with the wires to the trailer/caravan horse float .electric brakes
Hi, this may true if you connected the trailer brake to the connector on the factory wiring harness. There are several fuses that are needed for trailer towing. In the box by the battery, fuses 13, 25, 27, 53, and 54 are needed. You will need a relay in relay slot 19 for the trailer running lights, a relay in relay slot 20 to charge the trailer emergency battery; and, if your trailer has backup lights (6 or 7 wire connector), you will also need a relay in the relay slot 15. If you did not use the factory connector for your trailer brake controller, check to make sure you have connected the controller to an appropriate power source in the truck. Please let me know if you have questions, and thanks for using FixYa.
First thing is your van equipped with a trailer brake controller and is it working. This is usually a small box that is installed inside the vehicle and is needed to operate the brakes. Next what type of plug do you have on the vehicle to plug the trailer into some plugs do not support wiring for trailer brakes. If you have a aftermarket trailer brake controller it will not be fused in the fuse panel so you will to locate a inline fuse used to power up the controller. Hope this helps.
I had a hardtimefinding this informaton, hope it helps.
fuses Fuse link cartridge 2A Grey Grey — — — 3A Violet Violet — — — 4A Pink Pink — — — 5A Tan Tan — — — 7.5A Brown Brown — — — 10A Red Red — — — 15A Blue Blue — — — 20A Yellow Yellow Yellow Blue Blue 25A Natural Natural — — — 30A Green Green Green Pink Pink 40A — — Orange Green Green 50A — — Red Red Red 60A — — Blue — Yellow 70A — — Tan — Brown 80A — — Natural — Black
Passenger compartment fuse panel / power distribution box
The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses.
To remove the fuse panel cover, turn the panel fasteners counterclockwise.
To remove a fuse use the fuse puller tool provided on the fuse panel cover.
The fuses are coded as follows.
Fuse/Relay Location Fuse Amp Rating Passenger Compartment Fuse Panel Description 1 15A* Adjustable pedals 2 20A* Power point -floor console 3 20A* Power point – 3rd row 4 20A* Power point -instrument panel 20A* Power point -right rear quarter 6 20A* Trailer tow turn/stop relay 7 30A* High beam headlamps / Flash to pass 8 — Not used 9 20A* Heated mirrors 10A* A/C clutch 11 20A* Radio (main) 12 20A* Cigar lighter / OBD II 13 5A* Power mirrors/switches 14 15A* Daytime running lamps 10A* Driver’s seat module memory 16 15A* Rear seat controller 17 15A* Exterior lamps 18 20A* Turn lamps/Brake on-off switch (high) 19 10A* Body security module/4x4 module — Not used 21 25A* Rear wiper motor 22 20A* Engine control 23 20A* Engine control 24 15A* Air suspension 10A* 4-Wheel Anti-Lock Brake System (4WABS) module 26 10A* Airbags 27 15A* Ignition switch Run feed 28 10A* EATC module module/Front blower relay coil 29 10A* Customer access
Fuse/Relay Location Fuse Amp Rating Passenger Compartment Fuse Panel Description 30 15A* Highbeam headlamps 31 15A* Clutch interlock switch 32 5A* Radio (start) 33 15A* Front wiper 34 10A* Brake on-off switch 35 10A* Instrument cluster 36 10A* PCM Keep-Alive 37 15A* Horn 38 20A* Trailer tow park lamps and backup lamps 39 — Not used 40 20A* Fuel pump 41 10A* Instrument cluster 42 15A* Delayed accessory 43 10A* Fog lamps 44 10A* PATS module, transceiver 45 10A* Ignition switch Run/ Start feed 46 10A* Left-hand lowbeam 47 10A* Right-hand lowbeam 48 10A* Rear wiper motor 101 30A** Trailer tow electric brake 102 30A** Door locks/Body security module 103 50A** Ignition switch 104 40A** Heated backlite 105 30A** Injector driver module 106 30A** Front wiper main 107 40A** Front blower motor 108 40A** Auxiliary blower motor 109 30A** Heated seats 110 50A** Ignition switch 111 30A** 4WD/Shift on the fly 112 30A** Left-hand power seats
Fuse/Relay Location Fuse Amp Rating Passenger Compartment Fuse Panel Description 113 30A** Starter motor 114 30A** Right-hand power seats 115 20A** Trailer tow battery charge 116 30A** Ignition switch 601 30A CB Door window motors 602 60A** 4-Wheel Anti-Lock Brake System (4WABS) module 210 — Not used 211 — Not used 212 — Not used 301 — Front blower motor relay 302 — Powertrain (EEC) relay 303 — Injector driver module relay (Diesel only) 304 — Heated backlite relay 305 — Trailer tow battery charge relay 306 — Delayed accessory relay 307 — Starter relay * Mini Fuses ** Maxi Fuses