95 Crown Vic EATC – AC doesn’t work and no longer available from Ford.
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Joined: Dec 2009
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From: Dallas
95 Crown Vic EATC – AC doesn’t work and no longer available from Ford.
I apologize for talking about a sedan on your pickup forum but I figure a Ford is a Ford and maybe there is someone here who could help. I have a 95 Crown Vic and have been searching the web for repairs I can do to get the AC to work. I found one fix well described here for vacuum leaks inside EATC unit causing blend door problems.
I have a different problem.
The symptoms I have are, the AC compressor will not come on so it does not cool. I have put power from the battery to the compressor side of the AC clutch relay and it comes on. I suppose that in theory if the system were charged to over 430 PSI the high side switch would remain open. I had a shop check the system and they said it appeared OK to them except for the EATC.
Also, the controls seem to actuate the doors for vent defrost etc. properly and it calls for heat and does heat OK. It just will not send a signal to the PCM to activate the AC clutch relay. All the fuses are good.
First problem is Ford no longer carries parts for anything older than 10 years, according to 3 Dallas Ford Dealership parts people. So I can’t just go buy a new one even if I wanted to pay $700 plus for the part. I looked for a used unit but there are so many Crown Vic Homeboys running around in old cop cars that I guess the junk yards are empty of usable EATC units.
Second problem is I follow the directions to get error codes but nothing appears on screen. Perhaps I’m missing something.
Long story short, I think I have 2 options if I want AC; try and bypass the EATC and put in an on/off switch for the AC clutch somehow, or pull the EATC unit out and try to repair what is wrong with it.
Needless to say I would rather have the EATC unit working properly, but from a practical standpoint the switch idea would be way quicker I think.
Has anyone run into this set of problems before and if so how did they solve them? I read on a BMW restoration board that a guy had shown how he replaced a single 59-cent resistor in his BMW EATC unit and he said he fixed the problem. He had great pictures and described in detail how to do it. Obviously, that was German and we are talking Ford here but has anyone got a circuit diagram of the guts of these things. It’s got to be some simple cheap repair they just won’t tell us about. Surely if Ford isn’t going to carry parts anymore they wouldn’t care if somebody was fixing the old ones.
John
I have a different problem.
The symptoms I have are, the AC compressor will not come on so it does not cool. I have put power from the battery to the compressor side of the AC clutch relay and it comes on. I suppose that in theory if the system were charged to over 430 PSI the high side switch would remain open. I had a shop check the system and they said it appeared OK to them except for the EATC.
Also, the controls seem to actuate the doors for vent defrost etc. properly and it calls for heat and does heat OK. It just will not send a signal to the PCM to activate the AC clutch relay. All the fuses are good.
First problem is Ford no longer carries parts for anything older than 10 years, according to 3 Dallas Ford Dealership parts people. So I can’t just go buy a new one even if I wanted to pay $700 plus for the part. I looked for a used unit but there are so many Crown Vic Homeboys running around in old cop cars that I guess the junk yards are empty of usable EATC units.
Second problem is I follow the directions to get error codes but nothing appears on screen. Perhaps I’m missing something.
Long story short, I think I have 2 options if I want AC; try and bypass the EATC and put in an on/off switch for the AC clutch somehow, or pull the EATC unit out and try to repair what is wrong with it.
Needless to say I would rather have the EATC unit working properly, but from a practical standpoint the switch idea would be way quicker I think.
Has anyone run into this set of problems before and if so how did they solve them? I read on a BMW restoration board that a guy had shown how he replaced a single 59-cent resistor in his BMW EATC unit and he said he fixed the problem. He had great pictures and described in detail how to do it. Obviously, that was German and we are talking Ford here but has anyone got a circuit diagram of the guts of these things. It’s got to be some simple cheap repair they just won’t tell us about. Surely if Ford isn’t going to carry parts anymore they wouldn’t care if somebody was fixing the old ones.
John
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Joined: Dec 2009
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From: St. Louis