How do I install a brake controller on a 2005 Jeep Grand Cherokee for electric trailer brakes? I am wondering if Chrysler has a complete wiring harness on this truck or if there are some specific parts that I need.

This is a sensor usually located on the left rear tire on the inside of the brake assembly. It's the black plastic disk inside the brake rotor, between the dust shield and the rotor. there is a wire and a magneto sensor on it. If you don't know how to tear down the brakes completely, you should take this problem to a shop. It is rather complicated for this type of web page.

Do your brake lights work? Your cruise is tied in with your brake lights. If your brake lights are stuck on or there could be a bad switch or bad wire on the switch then your cruise wont work.

Don't bother with a schematic...they all differ. Use a simple test light and just probe the rear light harness with everything turned off except for the brake lights, only one wire should show power. You can also check the color of the wire coming directly out of the bulb socket. I own a jeep, can read and draw wiring diagrams and have yet to find a diagram that has the same color coding as my vehicle.

Details complete in the Service Manual Jeep-WK-Grand-Cherokee-Section-05-Brakes

I hope help you with this and have a nice day (remember rated this help) Good luck.

If this vehicle has an aftermarket towing package installed check for the trailer hitch wires shorted or kinked under the vehicle.

you will need to add an trailer light adaptor for this vehicle. this adaptor will combine the brake and signals from two separate sources. this unit can be purchased at walmart, Canadian Tire, Partsource, autozone. trailer shops. it will fix your issue. or purchase the vehicl specific kit for your Jeep.

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

Problem is a faulty Steering Angle Sensor (part of Steering Module) located in steering column ...replacement part $600.00.

Well, you need to make an educated guess here. Most have 9 inch unless you have either a factory trailer package, or it was at one time a police vehicle.

Disconnect all that trailer connector mess and start over. Someone messed up. Do you have a 6- or 7- way RV connector, a 4- or 5-way flat (U-Haul) connector, or what? Was an electric brake box installed under the dashboard for trailer electric brakes?

Better yet, sell me your Jeep cheap, it probably can't be fixed, and it's worthless.