Has anyone got relay and diode descriptions or any thing else that might help ? . I have no wipers and my hydraulics seem a little slow and die the engine down a little at times . I have plenty fuel ,recon injectors and running sweet . I was told a bad diode could cause the slight overload . I have only 1 power to the wiper motor .I assume it is the park power . The fuse sounds like it energizes 1 relay but the wiper switch doesnt seem to do anything .