My 1998 Volvo VNL 610 is being put out to pasture, if you will. It will be towing a forty foot boat on its trailer. The trailer has electric over hydraulic brakes. I've looked around a bit for a wiring diagram so I can wire in the electric brake controller. Not having much luck. I have to find the brake light wire near the dash and the blue wire for the brakes, going to the trailer connector. Suggestions are greatly appreciated.