Help with peterbilt wiring.

So I recently replaced the wiring harness in my 1993 379. almost everything works as it should except for a few gauges I think I hooked up wrong and the jake. My problem is with the jake tho. The peterbilt wiring schematic shows 5 wires at the switch on the dash but only 3 are needed. I found the three wires and hooked them up... Nothing. there are four prongs on the back of the switch, and there were only 3 wires hooked to the old switch when I took it apart. the wires I have are 225 224 and 223. where the hell do they go on the switch. I could have put more time into switching them around 40 times until I maybe got it to work but I assumed it would be easier just to get on here and ask. can anyone help? I also need interior upholstery and molding for my 93 with a non unibilt. the bunk upholstery is fine the cab is all that burnt. anyone have anything laying around. thanks!