Adding Electric Brakes, Brake Controller and Wiring Harness for a 7x12 Foot Enclosed Trailer  

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Expert Reply:

The first thing you are going to want to do is look at the axles to see if there are brake mounting flanges welded to the axle. If there is just a spindle that goes directly to the axle then there are no mounting flanges and you will need to have some added. This is a precision job that requires a qualified professional with experience welding on brake mounting flanges. I have included a link to our brake mounting flanges so you know what to look for.

You will also need to know the inner and outer bearing numbers. To get them you will need to pull off a hub and take out the bearings. This is something you are going to have to do anyway so might as well get a head start! The bearing numbers will be stamped into the metal of the bearings. With those numbers I can determine the correct hub and drum assemblies. If you cannot read the numbers on the bearings, you will need a digital caliper to measure the spindle in the noted places on the diagram to the right. A digital caliper can be found a most any local hardware stores.

The most popular Brake Controller for a 2004 Jeep Grand Cherokee is Tekonsha Prodigy P3 part # 90195. The brake controller activates the trailer brakes in proportion to your Jeeps braking action. If you don't have a 7-Way plug at the back of your 2004 Jeep Grand Cherokee, I recommend the installation kit part # ETBC7. This kit will have everything you need to install an electric trailer brake controller and 7-way connector.

I have included several FAQ's and installation video for you as well.

expert reply by: Chris B

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