85 Suburban window issues

[BigBlueBoy]

I have a 85 suburban with electric windows and non of them work. I have tried all the switches and they work. The fuse is good and no visible breaks in the wiring. The motors work if i run the wires to another battery? Is there a relay im not seeing some where? Any help would be appreciated. Thanks in advance.

[DnStClr]

There's a similar discussion in a recent thread Yes there is a relay up under the dash at the firewall. Check the wiring diagram that Vile supplied for troubleshooting.
http://forum.73-87chevytrucks.com/smforum/index.php?topic=18726.0