Hi all! I have a 99 Escort ZX2 with non-functional a/c. I found the a/c relay was bad (melted with a burned-out spot on the circuit board) in the CCRM, and I tried to solder in a new relay. In the process I messed the circuit board up. So I removed the new relay, and I'm just running the car without that one. I'm pretty handy with wiring in relays, and I'm now interested in just wiring in a toggle switch and relay to kick on the a/c when I want it on. I would really like to just be able to signal the ccrm to kick the a/c on with an external relay, but I’m not quite sure how to do it. Since the system monitors a/c pressure and adjusts the hi/lo cooling fan setting (and WOT state as well) I'd like to just have the system control everything like it's supposed to. Is there a way to do that? Plan B is to just install a relay to kick the a/c compressor in with a toggle switch and another relay to kick the cooling fan on high when ever I turn the a/c on. I'm not sure if this is a good idea. I would include the high and low pressure a/c switches in my circuit. I'm not certain that it's safe to just run power to the cooling fan's wire for high speed without some sort of diode. Not to mention that I recall reading somewhere that the high pressure switch isn't really a switch, but some sort of rheostat that signals the computer with the a/c system's pressure. What do you all suggest? I've looked at the local salvage yard for another CCRM (That I can fix if it needs it.... now that I know of a better way to desolder). They don't have one with matching numbers. I know I'm not paying $220 for another ccrm from Ford. I really would appreciate some advice. Some of the threads on this site show how to wire in an external relay, but it seems like that way would just make the a/c system always be on and running. And I’m not sure it would activate the cooling fan either. Thanks for any help you can offer. I'm interested in the wire diagram for the 2-speed cooling fan, as well as for the pressure switches / rheostat on the a/c system. I have a nice diagram for the CCRM, but nothing that shows me what each relay does; particularly what each pin on the relays is for.