Ok, you're doing good here. Now Mike, I just checked schematics. Did you know there are 6 configurations of how these cars were wired up?
Do you know if you have the one-touch power window feature? You should see the black box for it in the rear of the driver door IIRC. If you don't, that's one less item to consider.
Assuming you have one-touch, the red wire egresses the One-touch module and goes to the motor. You should see 12 volts at that wire if yellow shows ground, or vice verse (depending upon if you're rolling up or down).
If red doesnt do anything, the next step backwards appears to be whi/blk, going from the driver switch to the black one-touch box.
Ensure the One Touch box has 12 accessory volts from LB/Blk.
One last thing to check is that all grounds are good. Every pure black wire I've seen is a continuous ground. There's one on the One-touch module and a couple for each window switch IIRC.
I've been assuming you have a coupe and trying to generalize the wiring to include different forms of trim that matter. If you know, post if you have:
-a vert or coupe.
-factory remote keyless.
i-lluminated entry nit but no keyless entry.
-anti theft but no remote entry.
-no remote keyless or anti theft
(those are all items which change the wiring pathways slightly).