1994 Olds 88
Driver'* side switch will only put passenger window UP, but not down.
Passenger side window switch does NOTHING.
I measured the voltage at the driver'* side switch at the passenger switch, and when moved up/ down, the voltage polarity changes properly (i.e., UP makes +12v, and DOWN makes -12v as measured at the TAN and LtBlue wires).
Going over to the passenger side, and measuring the voltage at the passenger window switch at the TAN and LtBlue wires produces +12 when the driver'* side switch is moved in one direction (and will make the passenger window go UP), but produces NOTHING when the driver'* side switch is moved in the opposite direction, and indeed the window won't go down.
Using the passenger side switch produces NO voltage (when moved in either up or down) at the motor connector at all (and of course, the window doesn't move either way).
To verify proper motor operation, I disconnected the plug AT the motor, and applied voltage from an auxiliary battery, and the window will go both up AND down when the polarity of the 12v source is applied and reversed, so teh motor is GOOD.
Does this "ring any bells" with what a probable cause could be? At first, I wondered if one of the wires between sides was "open," but of course it THAT were true, the window wouldn't operate in ANY direction from the driver'* switch, but it does (goes only up).
I'd unplug the passenger side switch from it'* wire bundle to check the voltages w/o that switch being hooked up, but not sure how to do that. The two plastic clips when opened a tad do not allow the switch to separate from the terminals, and I am afraid that if I do it wrong, I'll have internal switch parts (balls, springs) all over the ground.
On the switch, there are two Dark Blue wires, a Brown wire, a Tan wire and a LtBlue wire (Note: The Driver'* Side Passenger Window Switch produce +/-12v to Tan and LtBlue wires just like the colors on the passenger side window switch).
Makes me wish I still had the full GM manual set (about 20 pounds of them) that I let go when I sold my '96 Bonneville. DAMN!
Here'* a photo of the switch w/ arrows at the clips I was referring to. Are their other ones I am missing? This is a Copy and Paste link (probably):
2013-07-04_1700 - bobinyelm'* library