Fred, Long Island

Passenger window switches are both dead. I've been throught the replacement routines....all combinations...new switches...no luck. This happened once before and with all my finalgling and even dismantling the door and applying direct current to the motor to verify it's life, the problem just seemed to go away without me knowing what I did. There must be a way to jump across the female plugs to activate the motor..I know there's constant power with the key on.
Any ideas? Fairly sure it's a ghost in the machine. Thanks all.