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The brakes system is surge? Not electric?
Probable cause is corrosion from sitting.. Rock the trailer back and forth while hitched( Not crazy like please- be gentle. ) Hit the brakes each way which takes a knack. It should break free. Problem is long term storage( over winter). They may also be stuck in reverse.. The controller. may need a hammer whack( universal adjuster)
Hi, the provision for the electric brake controller is located in the electrical center , just to the right of the parking brake. There is a plastic nut, that holds the cover on, and beneath this cover are ports where a connector may be plugged in. A factory harness must be obtained from a Chevy, or GMC dealer for the install. This harness will be labled with wire locations, as it will be attached to your brake controller, then plugged into the slot in the upper l/h corner of the electrical center. The plug will only fit in the appropriate slot. You will then need to put the provided J- fuse into the underhood fuse block. Tis should be the only missing fuse. You should be well on your way, after these few easy steps. Good luck...Coop
I belive it would be the wire that actually sends the control signal to the controller?...correct? well the if so you would need to tap into the wire casing with a test light to see which wire is lighting the test light when the brake pedal is depressed good luck
The ABS will shut off the trailer brakes if it detects a problem. It sounds as if the problem is in the ABS control unit, or the trailer brakes may not be grabbing hard enough causing the trailer to push the truck when you are attempting to stop. This sometimes can be corrected by adjusting the gain up on the trailer brakes.
what type controller did you install? Is this a camper or trailer? Is the controller hydraulic plumbed into master cylyder? Important to know how to adjust rheostat for sensitivity. If set at minimum the system is basically on the edge of not sending any signal to towed unit. The intructions should explain how to make this adjustment. If set too sensitive trailer brakes will lock up before the tow vehcle starts to brake. Controller should be set so trailer starts braking just befor the tow vehcle. If not the trailer will tax the tow vehicle brakes by pushing. Its set right when you feel the combination stretching out. trailer first then tow vehcle. Good luck and remember, if truck brakes first and too hard you risk a jacknife. All light voltages should be system voltage. Brake voltage is variable depending on setting on controller. Understand your breakaway brakes and how they work. breakaway breaks require an auxillary battery. Again, good luck and you know where to find me if I can be of anymore help.