It aint got one.....you need to follow the instructions from the towbar maker to splice into the existing wiring,and if you screw it up vauxhall will have NOTHING to do with the car EVER AGAIN.......(ASK A DEALER) YOU WILL LOSE YOUR WARRANTY FOR EVER IF VAUXHALL DONT FIT THEIR OWN........YOUR CHOICE..
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It aint got one.....you need to follow the instructions from the towbar maker to splice into the existing wiring,and if you screw it up vauxhall will have NOTHING to do with the car EVER AGAIN.......(ASK A DEALER) YOU WILL LOSE YOUR WARRANTY FOR EVER IF VAUXHALL DONT FIT THEIR OWN........YOUR CHOICE..