whitetailfreak

I am currently working on a 1989 John Deer Safari 40' motor home with a ford 460 power plant. the engine was remove for rebuilding. Now after reinstalling I am having brake issues with the belt that runs the brake pump breaking during driving. I have noticed the electronic motor that is somehow tied to the brake pump is not working and can not find any information on wiring, switching or any other operation. Help...its ready for the road but can't be stopped.