A/C wiring diagram

The A/C on my '97 Cav has quit working. There does'nt seem to be any voltage going to the compressor clutch. I have traced the wire back almost to the firewall and found no problem. I would like to jump across the pressure cut out switch, but do not know which 2 of the 3 terminals to jump. Could anyone please furnish a wiring diagram or make any suggestions for the A/C system?
thanks!

buy a haynes manual for $18 bucks. All the wiring diagrams are in the back of them.