The multifunction switch on this truck got me confused. When I flash the high beams, it also keeps the left turn signal and windshield washer pump on. When I turn on the high beams, it doesn't turn on at all. Also if I flash and press the washer on together, it shuts the whole car off. I tried replacing it with another multifunction switch, but it's still doing the same thing. Does anyone have any experience about this? Thanks for any help.