2009 Silverado 4x4 pickup with towing package and factory installed Trailer Brake controler installed at factory. The system has worked in past. I had my Stock trailer rewired and things tested out fine for lights and turn signals and brake lights. However, the trailer brakes do not work. I have checked all fuses for the trailer and they are OK. When trailer wheels are jacked up when using a DC charger to activate the brakes at the plug things are fine. On the trailer brake Control panel it does not show that I have the trailer connected. I do not seem to have a signal at the outlet connector. Help Ray
Re: 2009 Silverado 4x4 pickup with towing package and...
It sounds like you lost a ground.
check traier hookup first.
Probably not the controller.
P.S. There are multiple fuses for this setup. check all ! ! !
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GM also offers a built-in trailer-brake controller on 2009 half-ton trucks. Like Ford's, when activated, the truck's ABS brakes reduce gain to the trailer brakes. In GM trucks, however, the controller gain adjustment and hand control are on the left side of the steering column. It's all electronic, not hydraulic, This link has an article you may find interesting Trailer Brake Controllers What Wrong and What Right PickupTrucks com News
It sounds like someone messed up to me! Apparently, the brake controller got wired into an ignition circuit that it should not have gotten wired to. When accessories are added to a vehicle, it is extremely important that the vehicle wiring diagrams are used so that you know EXACTLY what you are tying into. Some of the Chevy trucks that are sold with trailer towing packages already have the wiring for brake controllers under the dash. This makes installation easy and is already tied into the correct things.
You have got 7 pin trailer connector that was included in the optional trailer tow package. This trailer tow package also includes an electric trailer brake wiring provision that terminates at a connector located on top of the large body harness connection under the instrument panel to the left of the break pedal, as well as an electric trailer brake pigtail harness and an instruction card that are stored in the glove box when the vehicle is shipped from the factory. You will need to add an electric brake controller of your choice that will plug-in to the harness and that will also give you power on your auxiliary circuit.
I found the problem. Talking with a technician from the controller company, we determined that it was a fuse problem. I found that the fuse to the CHMSL was blown.
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.
Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
REgards,
they are seperate fuses and also has trailer light relay for tow package models , look for trailer light relay fuse , with key on check them all while your there , if fuse is good , swap with another relay , if that will not work , check bulb housing for melted terminals , lastly have body control module ckecked
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