Hello everyone, Hugoc, in that truck, as almost any modern mid -range motor racing -highly all electric consumers pass through a control module (BCM), therefore this is in fact continuously monitors the consumption in amper of each circuit. Therefore, if you increase the current consumption of any of them, the module protects the circuit and also, against overloads caused by excess of current in position systems or others that are no longer by normal ampoules, if not LEDs, of low current consumption ..... Therefore the manufacturer provides this citation by placing a preistalation of the drag car, where the electrical system must be connected. If you are not sure, go to someone who knows that truck, I have seen several problems generated in electronic systems, for an incorrect installation of a non -original device .... like a car. drag Kind regards.