'92 A/C Problems
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'92 A/C Problems
Moving this to the correct forum ... seeing as how I have an Explorer not an Expy ...
Purchased this car in December, so today was the first time I tested the AC ... anyways, I'm not getting cold air. I've checked the preasure of the R134a and found it to be "charged" (cool little toy from PepBoys). I realized that the compressor wasn't turning on, so I hooked my volt meter up to the plug that hooks into the compressor I didn't see a change in voltage. After hunting for a fuse diagram, I checked the #18 fuse (15 amp) is supposed to be for the "ac system" but its not blown. I'm a bit lost as to where to go from here. Any ideas?
Purchased this car in December, so today was the first time I tested the AC ... anyways, I'm not getting cold air. I've checked the preasure of the R134a and found it to be "charged" (cool little toy from PepBoys). I realized that the compressor wasn't turning on, so I hooked my volt meter up to the plug that hooks into the compressor I didn't see a change in voltage. After hunting for a fuse diagram, I checked the #18 fuse (15 amp) is supposed to be for the "ac system" but its not blown. I'm a bit lost as to where to go from here. Any ideas?
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Joined: Aug 2001
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From: South Texas
Working from the compressor clutch backwards (per the schematic), check the following.
1. WOT (Wide open throttle relay) Located under the fuse box in the engine compartment (right fender) Computer opens this relay at cranking and under wide open throttle conditions. Fairly easy to replace and the part is around $12 at Autozone (replacement is a universal relay with same part as the fuel pump relay, EEC power relay)(lead colors; in- DG/O, out- BK/Y)
2. Low pressure cut out switch. Located on the dryer assembly. This switch opens the clutch circuit when pressure in the system falls to around 20-24 PSI (low charge). Pull the connector, short the leads and if compressor comes on, the switch is defective or charge is low.(lead colors; in-P, out- DG/O)
3. From the Low pressure switch, the lead goes back to the AC compressor button in the dash or the Defrost switch, then back to interior fuse panel fuse 7, 10 amp which is hot in the key run position. lead colors; in-Y, out- P)
Hope this helps
Dialtone
1. WOT (Wide open throttle relay) Located under the fuse box in the engine compartment (right fender) Computer opens this relay at cranking and under wide open throttle conditions. Fairly easy to replace and the part is around $12 at Autozone (replacement is a universal relay with same part as the fuel pump relay, EEC power relay)(lead colors; in- DG/O, out- BK/Y)
2. Low pressure cut out switch. Located on the dryer assembly. This switch opens the clutch circuit when pressure in the system falls to around 20-24 PSI (low charge). Pull the connector, short the leads and if compressor comes on, the switch is defective or charge is low.(lead colors; in-P, out- DG/O)
3. From the Low pressure switch, the lead goes back to the AC compressor button in the dash or the Defrost switch, then back to interior fuse panel fuse 7, 10 amp which is hot in the key run position. lead colors; in-Y, out- P)
Hope this helps
Dialtone
Last edited by Dialtone; May 31, 2005 at 12:03 PM.
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96 A/C Problems
Dialtone ... those are all GREAT suggestions. I'll check them out when/if I ever get home 
... rough day @ the office. Also, one side note, Explorer is a 96 (the Stang is a 92) I know it won't make much of a diff in diagnosis of the A/C ....
... rough day @ the office. Also, one side note, Explorer is a 96 (the Stang is a 92) I know it won't make much of a diff in diagnosis of the A/C ....
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