Hey all. New here. I am working on a 2005 atp 500ho of my bosses. We had intermittent power to everything. Thought it was in wiring at left switch at first. Traced wires and found some corrosion in the 2 buss blocks up front. Cleaned them up and still nothing. Found that the main ecu had power to it but not out. Replaced that. Now it will only start and run with the headlight switch in low position. Dies when flipped to high or off. Replaced left bar switch. Still the same. Any ideas? I have looked all over for a good wiring diagram for this and can5 find one specific to the atp.