My wife and I had inherited a 95 Crown Vic LX from one of her aunts. The Ford dealer had convinced the elderly woman to buy a new Ford because they claimed they couldn't fix the A/C. I fixed it with a 2 dollar relay and some R-134. Go figure.

After purchasing a factory shop manual and a factory wiring manual on Ebay and several months of researching here and other places, I dove into fixing the A/C on the 95 Crown Vic we inherited.

I had been told that the EATC head on the car was no good. After checking everything I could like A/C Clutch relay, clutch, cycle switch, fuses, etc, I decided to pull the computer and look inside the black box.
What the heck it didn’t work already what harm could I do? Heat, defrost and the air doors all worked OK so it was something to do with the signal to the A/C clutch.

From the factory manuals I deduced that the output signal from the computer was sent out to the cycle switch on pin number 25, circuit 348(P) A/C Cycling Clutch output, connector number C228F Black. Since I was getting no output at all from the pin I figured to look at the PSB and see if there was any sign of discoloring or heat. Lo and behold, I found a solder joint where one pin of the OMRON power relay on the main board was burnt to a crisp. After tracing the circuit over to pin number 25 it made sense to try to repair with a new relay.

I found 10 of the exact part number on Ebay for 8 bucks plus shipping. The part number was OMRON part number G8SN-UA-007115 Ford part number F5RF-14A640-CA. I unsoldered the relay with the burnt pin and replaced it with one of the new ones. I decided to add a jumper from the relay pin, which had previously burned the connection to the pin, which was connected to output pin 25 because I thought the printed circuit board might be burnt through. I took a piece of stranded 18 gage copper wire about ½ an inch long to make the jumper. I soldered the ends to the wire to the pins of the respective relay and A/C output pin. I had no way to test the new relay and the repair but to put it in and see if it worked, so I did.

Don’t laugh but luck was with me and I had power out from the EATC now so it was just a matter of making sure the cycling switch was working and getting the system charged.

I am grateful to everybody who responded to my earlier requests for information. I never did figure out a way to bypass the computer so this is the best I could have hoped for.

John

 

Thanks fo the update John..

 

I need the same part and there is none listed on e-bay. Was wondering if you had to purchase more than one and if so do you have one you would be willing to sell?

 

I'll send you a couple if you'll send me your address. Mail me a 5 dollar bill and I'll return the favor by sending you a couple of the Omron relays I got off ebay. The biggest cost is the mail. According to my wife a 2nd day UPS small box is $4.95. The $.05 is for my time and the 2 relays.
padlstandg@aol.com