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Showing results for tags 'tow'.
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I just finished installing a factory tow package on my 2009 Cayenne. When I hook up to a trailer and test, everything works except for brake lights. I checked for power at pins 3&9 on the 7-pin and only have power present there with blinker and not brakes. I've check all fuses related to the tow package (1,3,5,19,&41) and all are good. I tested the trailer on another vehicle and the brake lights work. Since I don't have power to those pins, the issue has to be with the Cayenne. Do I need to have the computer flashed if I am not using electric brakes? The trailer I will be hooking up to has surge brakes, so I didn't think I needed to visit the dealer. Any assist would be greatly appreciated!!! Not sure if it makes a difference, but when I purchased this car, it had a Curt hitch with a flat blade connector in the back compartment. I didn't trace out and remove this wiring, only the hitch. Thanks -Ty