98 voyagers A/c

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  #1  
Old 08-02-06, 03:47 PM
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98 voyagers A/c

I recently bought a 1998 Plymoth Voyager 3.0. Here are some of the problems. First the cooling fan motors aren't running, spin somewhat freely by hand. The a/c isnt cooling, failed the cooldown test, compressor isn't running either. Checked the fuses all are ok. Not sure how long the cooling fans have been out. For now the fans are first on the repair list,something I know I can do, but where should I start checking for the next problem once the fans are running? I notices some relays in the fuse box, how do you tell if the relays are good, I noticed they have the same part numbers on them, but didnt know if removing one and testing it for a/c or the cooling fan would cause computer problem, Can anyone give me some guidance?
 

Last edited by full lips; 08-02-06 at 07:13 PM.
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  #2  
Old 08-02-06, 06:11 PM
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full lips,
Yeah, Iíd figure out whatís going on with the fans first! Then we can attack the A/C problems. Are you saying the fans donít go on at allÖ.ever?

Iím not real familiar with the Voyager but as hot as itís been, the fan should be kicking on to cool the radiator, even with the A/C off. On my car, the fan has two speeds and no matter what, when I turn on the A/C, the fan switches to its high speed.

A good way to check that is to get the car up to operating temperature and with the A/C off, make sure the fan is running. If itís real hot, it might already be running at its high speed. Then, hose down the radiator and after a few minutes, as it cools off, listen if the fan kicks down to its slow speed. If/when it kicks down, then turn the A/C on Max and the fan should immediately kick into high speed. If not, it might be a problem with the fan itself!
Good luck,
Phil
 

Last edited by DIYaddict; 08-10-06 at 07:05 PM. Reason: Removed unnecessary quote
  #3  
Old 08-03-06, 04:03 AM
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the most common problem is usually the fan control module some may call it a relay but its more like a module would check to make sure the fan work by jumpering power to the fan if the fan or fans work supect the module is bad.
chrysler uses a pressure switch in the high side of the a/c and will cycle the fan on and off as needed based on high side a/c pressure if the compressor will not even come on suspect that their is another problem with the a/c possibly low on freon.
 
  #4  
Old 08-03-06, 09:29 AM
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+1 what he said.
 

Last edited by DIYaddict; 08-10-06 at 07:06 PM. Reason: Removed unnecessary quote
  #5  
Old 08-03-06, 05:26 PM
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If it is the same as the 99-2000 dodge it has two fans 1 for the engine and one for the ac. If one the one for the engine is working then the problem is on the ac compressor side of things not the relay. the relay controls both fans. the 99 - 2000 model relay is under the battery box mounted to the inside of the frame rail. Those wires should go to the fans. If engine cooling fan is ok then you have to get your compresser chargered up and running for the fan to run because of the pressure switch mentioned above.
 
  #6  
Old 08-03-06, 06:24 PM
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It could be a blown fusible link if your van uses that instead of a fuse for the fan.
 
  #7  
Old 08-10-06, 03:49 PM
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Originally Posted by bejay
the most common problem is usually the fan control module some may call it a relay but its more like a module would check to make sure the fan work by jumpering power to the fan if the fan or fans work supect the module is bad.
chrysler uses a pressure switch in the high side of the a/c and will cycle the fan on and off as needed based on high side a/c pressure if the compressor will not even come on suspect that their is another problem with the a/c possibly low on freon.

Bejay I have jumped the module to check to see if the compressor would kick on also and nothing, jumpered the fans also nothing, would charging the system with freon first then checking this again with freon in system help any? Thanks so much for the reply, I have found a fan motor assymbly for about 125.00 which is a deal from what I have found, so before I buy it I just want to make sure this is what the problem is, but I know its hard to judge over this blue box. Thanks
 
  #8  
Old 08-10-06, 03:54 PM
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Originally Posted by Philossifer
full lips,
Yeah, Iíd figure out whatís going on with the fans first! Then we can attack the A/C problems. Are you saying the fans donít go on at allÖ.ever?

Iím not real familiar with the Voyager but as hot as itís been, the fan should be kicking on to cool the radiator, even with the A/C off. On my car, the fan has two speeds and no matter what, when I turn on the A/C, the fan switches to its high speed.

A good way to check that is to get the car up to operating temperature and with the A/C off, make sure the fan is running. If itís real hot, it might already be running at its high speed. Then, hose down the radiator and after a few minutes, as it cools off, listen if the fan kicks down to its slow speed. If/when it kicks down, then turn the A/C on Max and the fan should immediately kick into high speed. If not, it might be a problem with the fan itself!
Good luck,
Phil
Phil the fans NEVER COME ON... I have driven it and gotten it up to op temp and nothing, neither fan, compressor wont turn either, jumped the module on the high side I believe and nothing no compressor, jumped the fans, nothing, found a fan assembly for 125.00 which is a good deal but wantedt to find out for sure before I bought fans. Thanks so much for the advice, but I'm still hot. Don't know what else to try other than just changing the fan and adding freon, question would the fans in any way keep the compressor from coming on, or would that be more a low freon problem? Once again thanks so much.
 
  #9  
Old 08-10-06, 07:00 PM
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the fans not working could, theoretically, keep the compressor from staying engaged, but not from engaging alltogether. If the fans don't cycle when the a/c is turned on then the system will build up too much high side pressure and the pressure switch (if it's working correctly) will tell the computer to cut the signal to the compressor. With the A/C relay unplugged test each terminal with a mulitmeter (there should be four). One terminal should have battery voltage at all times, one should get voltage with the ignition on, one should read as a ground and go directly to the compressor clutch, and the other will be a ground signal from the computer. To test the ground signal coming from the computer, hook the black lead to a known engine ground and the red lead to the relay terminal. Set your meter to continuity. Start the engine and turn the a/c switch on your heater control panel to on. If the meter shows continuity then you know that you are getting the signal from the computer and either you have a bad wire or a bad relay (as long as the part numbers are the same you can switch relays with a known good one next to it and test it that way). If you do not get a signal from the computer then you should check your freon and/or your pressure switch or switches. there is also the possibility that the computer is not recieving a/c request from the control panel itself.
 
  #10  
Old 08-11-06, 06:39 PM
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Fan motor testing

If I suspect a faulty fan, 1 way to check it to apply power and ground directly to the fan motor. I check for the proper fuse rating, that goes to the fan motor, create a lead with an in-line fuse holder, and proper fuse (30 amp, 40 amp?) Hook that to 1 terminal of the motor and positive power, then another lead to the other terminal and ground. It'll either work or won't. Of course, keep your hands, sleeves, shirt ect out of the fan blades!! It's hard to unplug those things if you're wound up in it, or missing a finger!
 
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