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#1
07-22-2007, 11:01 AM
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1994 Caravan Radiator Fan / AC
Hello all , I have been trying to diagnose my 94 caravan . I have checked all fuses , changed all three fan relays ( low fan , high fan , fan ground ) . I even changed the ECU behind the battery . I heard that had worked for one forum user with fan problems . The AC clutch does not kick in either . The fan does run when voltage is applied . The clutch functions when voltage is applied . ALL fuses check good . Am I missing something ? I there another relay besides the three I can see ? Any advice will be appreciated .
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#2
07-22-2007, 12:05 PM
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Re: 1994 Caravan Radiator Fan / AC
"The AC clutch does not kick in either . The fan does run when voltage is applied . The clutch functions when voltage is applied."
Based on the quoted statements, the problem that you didn't state is apparently the cooling fans and the A/C are not coming on...correct? Are they not coming on at all or just when you attempt to turn on the A/C? Your A/C clutch may not be engaging because of a low refrigerant charge. Have you had it checked? The fans won't turn on if the A/C doen't turn on. In the case of the fans not turning on when the temp rises, it appears you've checked everything but the coolant temperature sensor.
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**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan
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#3
07-23-2007, 07:24 AM
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Re: 1994 Caravan Radiator Fan / AC
I'll try to be more clear . The cooling fan does not come on at all . I had read here that with the coolant temp sensor disconnected that turning the key to ON would start the fan . This is why I did not mention the sensor . Unplugging it takes it out of the loop . The fan doesn't run . In the case that some things I read on the Forum may not be true , or not true for my model year , I will replace the sensor and go from there . Concerning the AC Clutch , I have bypassed the pressure switch , a procedure that will make the clutch run on most anything that rolls down the road . No voltage to AC clutch . There is voltage to the AC Clutch FUSE in the underhood fuse pack .
Hope that makes things a bit clearer . If I ever figure it out , you can be sure I will post the FIX .
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