I have a 2010 WH and it has no wire,i ended up running a wire from the brake switch near the brake pedal to a flat 12 pin plug, i can't remember what pin number it went to or what the reason was for hooking into the brake switch,the wiring map is in the van witch is stored at my daugthers place at the moment.
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2017 WH2 Trailhawk
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