So you have your exhaust brake fed off the BK/OR wire coming out of the steering column? First of all, change the feed to the exhaust brake to the 10 gauge Dark Blue wire. Don't use a scotch-lock... Solder the wire for a more positive connection. Check the BK/OR wire, and make sure it is ok.
There are two connectors going into the back of the igntion switch. One is a 7-pin flat, and the other is a 4-pin flat. Make sure thse are ok, and all the pins are in good shape. In the flat-7 connector, there is a 12V+ constant hot. Check for power here. It will be a RED 10 gauge wire. Same goes for the Pink/Black wire--12V+ constant hot. If this checks out ok, then you know there is power getting to the ignition switch.
The BK/OR wire from the ignition switch feeds fuses 2, 3, 7, 18, and circuit breaker 1. All these are in the in-cab fuse box.
Fuse 2: 10A Feeds climate controls & heated mirror switch
Fuse 3: 10A Feeds ABS control
Fuse 7: 10A Feeds backup lamps, DRL module (if equipped)
Fuse 18: 10A Feeds airbag control module
CB 1: 20A Feeds power windows & locks
If the BK/OR wire is not connected, all the above functions will not work. THis would explain your power window problem. Check the locks too.
Check this stuff, and get back to us!
