Device is to activate electric trailer brakes on a tow. We have one in the same place. Mine draws power from a red wire running direct to battery with 30amp fuse at battery. It is activated by a wire going to the hot side of the brake light switch mounted above the brake pedal. A blue wire goes to the rear of the coach to the 7 pin trailer wiring harness. To test, you will need to have ignition switch on, somebody to depress brake pedal, and test light at the rear where the connector should be taped up somewhere around the middle of the hitch. You will need to scrape off some paint for a good test ground, or use the ground pin of the trailer light connector.
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Originally Posted by MAJWayne88
I have a device mounted under the dash, by my left knee, that I cannot figure out. Attached is a photo of it. Can anyone tell what it is?
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