2010 Tahoe LTZ - Completing Hook-up of Factory Installed Trailer Brake Controller

[JM13206]

Hello,

 

I have a 2010 Tahoe LTZ with the factory trailer hitch and factory integrated brake controller. Previous owner never attempted to hook up the factory brake controller so I hooked up the two wires that were bundled up in the harness under the hood and attached them to the terminals in the fuse box under the hood. Also I verified that the fuses associated with the trailer brake controller are good in the fuse box. In addition, I confirmed with the dealer that this Tahoe came with the factory integrated trailer brake controller option (JL1). When I hooked up my car trailer, the integrated brake controller doesn't recognize that the car trailer has been hooked up though I have auxiliary power at the 7 pin trailer connector providing power to the trailer brake battery charger and the trailer lights operate properly. Also, under the dash is the factory harness for hooking up the aftermarket controller. A friend told me that when the Tahoe was new, a pigtail harness was provided that needed to be connected under the dash so I wanted to verify if this pigtail harness is required and where it should be hooked up. In addition, if the pigtail is not required, I would like to get an idea of what else could be wrong with the factory brake controller because the trailer brakes work when hook up to my friends truck. Thanks!