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#1
06-22-2005, 11:03 PM
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98 With no a/c clutch enguagement
Have a 98 escort four door with non working a/c. Has plenty of freon 134. The cycleing switch has power on both sides. I have no power to the compressor clutch. I replace the high pressure switch a month ago and it worked fine. I think I may have a ECM problem. Any one had this problem?
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1967 cougar 390 FE in progress 1993 F350 Crew Cab 5.8 111K 1983 Coachman 23ft class C 460 1988 Bronco 351 C6 1964 Galaxie 428 4sp project 1995 Mustang 3.8 Auto 1966 Mustang Fast back Project 1994 Tracer Trio 1.9 1968 F250 Camper Special 390 
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#2
06-23-2005, 02:30 AM
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Re: 98 With no a/c clutch enguagement
How did you test the cycling switch?
It is not likely to be a computer problem.... have you retrieved any trouble codes from the computer? I think there is an AC relay in the engine fuse box...
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#3
06-23-2005, 10:25 AM
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With sensor plugged in i back probed both terminals and have power to both. The relay is a module under the air cleaner and it is not getting the 12v signal from ecm to power it up.
__________________
1967 cougar 390 FE in progress 1993 F350 Crew Cab 5.8 111K 1983 Coachman 23ft class C 460 1988 Bronco 351 C6 1964 Galaxie 428 4sp project 1995 Mustang 3.8 Auto 1966 Mustang Fast back Project 1994 Tracer Trio 1.9 1968 F250 Camper Special 390
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#4
06-23-2005, 03:25 PM
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Re: 98 With no a/c clutch enguagement
There is a 10A fuse in the engince fuse box with a DB/Y wire leading to the A/C relay. On the other side of that relay is a DG/BK wire that leads to pin 10 on the EEC. This DG/BK wire also splits and connects to the cutout relay. On the other side of this cutout relay is a DB/BK wire leading to pin 54 on the EEC.
Trace these wires to each of the relays... one of them is probably not working. I doubt the problem is in the computer.
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#5
07-10-2005, 10:03 AM
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After checking all the wires I replaced the a/c module under the air filter. And problem solved. It was also giving me a code for the idle speed control. It must be a bigger problem because the part was on back order and took a week to get.
__________________
1967 cougar 390 FE in progress 1993 F350 Crew Cab 5.8 111K 1983 Coachman 23ft class C 460 1988 Bronco 351 C6 1964 Galaxie 428 4sp project 1995 Mustang 3.8 Auto 1966 Mustang Fast back Project 1994 Tracer Trio 1.9 1968 F250 Camper Special 390
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