Hi all i got a towing module and all the tow hitch is prewired as it a used towbar it came off the car complete with no wries cut it came with a gm module i know where the module plugs in and all the main wireing plugs the problem i have there is one wire with a micro 10amp fuse on it where in the fuse box and what number dose it go into this is fuse box in the boot of the vectra .anyhelp thanks also do i have to actvate this in the ecu ???