86 300E driver side window won't roll down. It was working fine 2 days ago. The other 3 windows roll down/up with no problems. I've replaced the switch with a new one and I've changed the fuse (G & H) with a new one.

When I press the switch while my door is open, the lights will dim...I assume that means the switch is making contact and "doing its job".

What else do I need to check?

I have an extra whole power window assembly from the front passenger side (got it from a junkyard about a little over a year ago). Would I be able to use just the motor and the regulator and just replace the one on the driver's side? (if it's the motor and/or regulator?)

Thanks in advance,

jrmd01@yahoo.com

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JR
1986 Gold 300E 4Dr automatic