Passenger Rear Window

[neo1973]

The rear window would go down but not up.

I am stumped. I have taken the door apart so that there is basically just the window and the vertical rail. Here is what I have found out:

I tested the switch first. I even went as far as trying the switch on the driver rear window, and it worked. I used the driver rear switch on the passenger rear, and it didn't work. So I figured motor.

I drill the hole and go to take the motor out. No go, so I drill the rivets out for the regulator and out that comes as well. Regulator seems in good working order, maybe its the motor or bushings.

I take the motor apart; it has no bushings. There is just a big gear connected to a worm drive coming from the motor.

I use an 18v drill battery to test the motor. It goes, backwards and forwards.

I start testing voltage around the connections. I put probes in the socket that connects the switch to the pigtail from the motor. Press the switch and I get voltage for down, but no voltage for up (actually, it gets a couple of tenths, but not really anything).

How can it get one signal and not get the other, especially if the switch is working?

 

[neo1973]

bump. anyone?

 

[buckwill]

your switch reverses the voltage to the motor,, there may be a relay in explorers,, should be as door window motor is moore amps than m switcj shhould draw,, so track yur circuit, or use sledge hammer approach make the wiring from switch work the window with jumpers if it doesnt then u know problem is from that position to window,, as u say it works on drivers side so look for wiring problem