Does your system have the correct amount of freon?
there is a limiter switch on the dryer on the firewall, you can jump the compressor there but if the system is low on freon you could possibly cause damage so don't run it very long.
Don't know if there is a difference in years, the wotr is under the mafs on some years, according to the diagram at veryuseful.com it should have a pink/lt blue stripe and red wire in and a black/yellow stripe out to compressor.
What is a WOTR? Wide Open ?? Relay.
What is a comp relay?
'88's had no maf, except for California cars.
WOT Cutoff Relay is located on the LH side of engine compartment.
You can actuate the compressor clutch with the engine off & ignition on.
The following are diagrams courtesy of Tmoss & Stang&2birds
HVAC vacuum diagram
Fuel, alternator, A/C and ignition wiring
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring; http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.