2015 Buick Enclave Owner Manual - Page 254

Driving and Operating *The fuse for this circuit is installed in the underhood electrical center, but the wires are not connected. They should be connected by your dealer or a qualified service center. If the back-up lamp circuit is not functional, contact your dealer. If a remote (non-vehicle) battery is being charged, press the Tow/Haul mode switch located on the center console near the climate controls. This will boost the vehicle system voltage and properly charge the battery. If the trailer is too light for Tow/Haul mode, turn on the headlamps (non-HID only) as a second way to boost the vehicle system and charge the battery. Electric Trailer Brake Control Wiring Provisions These wiring provisions for an electric trailer brake controller are included with the vehicle as part of the trailer wiring package. The instrument panel contains blunt cut wires above the parking brake assembly for the electric trailer brake controller. The harness contains the following wires: ... 9-53 Conversions and Add-Ons Add-On Electrical Equipment { Caution Some electrical equipment can damage the vehicle or cause components to not work and would not be covered by the warranty. Always check with your dealer before adding electrical equipment. Add-on equipment can drain the vehicle's 12-volt battery, even if the vehicle is not operating. The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle on page 3-33 and Adding Equipment to the Airbag-Equipped Vehicle on page 3-33. Red/Black: Power Supply White: Brake Switch Signal Gray: Illumination Dark Blue: Trailer Brake Signal Black: Ground The electric trailer brake controller should be installed by your dealer or a qualified service center.