hi on my vy it gets over heated because the engine cooling fan is not working when i turn on the A/C the fan for that works but the other one does not. power is still coming to the fan that is not working because when i turn on the ac the ac fan works and when i turn it off the engine cooling fan that does not work just spins once and then stops my dad is a mechanic and he said its probably the switch and that is why i need the wiring diagram for it because we could not find the switch PLEASE HELP