i took apart my right door today to install my new window motor and when i did i hooked everything up and it will go up but it wont go down?!.... so i decided to throw my old motor across the driveway... then i hooked the old one up again to see if it would work and it did but it will only go up and not down!? what could be the prob..? i tried both switches and the down button will not make them go down ...i need info fast cause i need to get this done today!!! thanks

 

Check your wiring you prolly have a loose connection

 

ive been doin that but ill keep tryin it maybe itll come around..any more help would be greatly appreciated...

 

I had the same trouble with my car. Here is what I found. I did the same repair as you with no fix to the problem. Upon further investigation I found the wiring harness broken on the driver's door right where it flexes when you open and close the door. You need to remove the driver's side kick panel and unplug the door harness connectors and feed the harness out throught the body to the door opening right at the area where the door meets the fender. This will give you more room to work the harness. Then remove the rubber boot off the harness and look for a broken wire(I fail to remember the color code on my 90 Stang' harness.) Once you finfd the broken wire you need to do a clean job soldering it back together and use heat shrink tubing to reseal the wire. Then try the repair to verify the fix before putting your ride back together. Hope this helps. wildcobrar

 

Well, you could always use a Multimeter as well to check and see if there's any extra resistance in the wire(or if it's cut entirely)
Just try and follow it back from the switch to the harness as cobra said.
Remember to disconnect any power going to it though if you're to "ohm it out"

 

what do you mean by ohm it out?

 

well ie been tryin but no luck heres a diagram of what im dealin with maybe itll help some people understand and maybe someone will know what the hell is wrong!
heres the diagram-------- http://img488.imageshack.us/img488/7...owmotor1jr.png

 

This funny. But Serious.

 

why is it funny?

 

91lx that was a good picture you made im impressed. but for the motor part it sounds like you have a bad connection in the wire like wild said