I understand. Sorry.

Well my attempt to run a bridge wire to the evaporator temp sensor to the high pressure sensor wire didn't work. I had the engine running and merely connected the end of the wire to a mutimeter to read the voltage (5v) and the engine stopped dead and the starter would not engage. I disconnected the ...

Thank you very much for the schematic. I appreciate all the help. I am beginning to think that the grey/red power wire make be broken somewhere in the harness so I might try making a new connection wire frrom the high pressure sensor since both would be receive a 5 volt charge when AC switch is acti...

The ECM I took from the other Crown Victoria appears to be from a P71 (police version) and does not fit the wiring for my civilian P74 version so before I try to source another ECM I hope that someone on the forum can confirm that the power signal and at what voltage is sent from the ECM or somewher...

ECM from parts car removed but not installed. The EATC module in the parts car is junk. I tested all thre sensors again just for fun
1.Low pressure has 12 Volts (from EATC)
2. High Pressure has 5 volts from ECM
3.Evaporator Temperature shows 0.8 volts from ?

Yes I will swap out the ECM and module. Black flies are out and biting now but I can lather on some fly dope and get them out of the spare parts car. Probably worth a shot. The FoRd Wiring Manual shows the ETS harness goes into the firewall and not back to the ECM so likely it leads to the EATC modu...

Thank you once again for your assistance. My understanding is that the ECM supplies ground to the clutch relay. By control module do you mean the in dash control panel? There is a way to have the module do a self scan for fault codes and that shows no issues but it may not be complete. No faults sho...

Thank you for the advice and yes I plan on vacuuming system and recharging it but not before I know why the clutch does not engage without jumping the relay which by the way is not defective.. I was under the impression that the compressor should operate if the relay receives ground from the ECM if ...

I am having a problem with the AC on my 2003 Ford Crown Victoria and I hope someone on this forum will be able to help with this specific vehcle. 1. R-134 pressures are good and within range 2. Compressor clutch will engage and AC will operate if clutch contacts are bridged with jumper wire and ac b...