XJ XJ6 / XJR6 ( X300 ) 1995-1997

A/C issues, fans not running

  #1  
Old 07-27-2013, 06:38 PM
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Default A/C issues, fans not running

Right, compressor runs most of the time, but a/c doesn't blow cold (always, but sometimes, rarely, it goes get to a nice freezing temperature). My car does have the mod with the white wire looped on the pressure switch, so the fans should always be running (they aren't). When the fans aren't running, the pressure gauge I hook up to it reads very high, when the fans are running, the pressure drops down to normal. I checked the fuses, they're fine. I checked the relays up front near the fans, although I don't know how to tell if they're bad or not, and which of the 3 are for the fans. My car is also pulling codes 23 and 24 for the a/c.

From what I've read it's either the pressure switch. How difficult is this to replace? Would I need to depressurize the system? OR, if not the pressure switch, the relay. I've never dealt with having to replace a relay, is it something I can just pick up at the auto parts store, and what's the general price, just so I've got a figure in mind? Thanks.
 
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Old 07-28-2013, 10:30 AM
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The fan control module is clipped to the underside of the body, below the LH headlamps. Rather large, white cover, accessible from below. If it get loose it hangs upside down by the harness and fills with water and crud. Result, no fan. Check that first.

Cheers,
 
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Old 07-29-2013, 01:26 PM
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Um... I can't seem to find it.

Below the LH headlamps, the driver's side? Like where the windshield fluid reservoir is, but on the driver's side? I haven't got anything over there, and no extra unconnected wires hanging about either.

edit: FOUND IT! It was still connected fine, took it off, was plenty clean, just a bit of dust/dirt on the outside. Inside the prongs were nice and shiny. So, relays or pressure switch next?
 

Last edited by TopHatChef; 07-29-2013 at 01:43 PM.
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Old 07-29-2013, 01:37 PM
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Originally Posted by TopHatChef
Um... I can't seem to find it.

Below the LH headlamps, the driver's side? Like where the windshield fluid reservoir is, but on the driver's side? I haven't got anything over there, and no extra unconnected wires hanging about either.
Yep! LH side [driver side in US], right beside the brake cooling duct. Here is a pic of the same part in the X308. That's the wiring and connector to look for. The X300 does not have the atmospheric tank you see here. Also the location as shown in the wiring guide.

Good luck!
 
Attached Thumbnails A/C issues, fans not running-p7293005.jpg   A/C issues, fans not running-x300-fan-module.jpg  

Last edited by xjrguy; 07-29-2013 at 01:43 PM.
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Old 07-29-2013, 02:06 PM
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Thanks. I managed to find it just I made my edit, and you posted it looks like. I went ahead and just turned the car on and the a/c on (not blowing cold, and the compressor wouldn't turn on), and I could hear what sounded like the relays up front clicking (the row of 3 near the windshield wiper fluid reservoir. I read somewhere that they have stuff to do with the fans/compressor). It sounded like they kept clicking. Is that a sign that they're having issues 'turning on' (sorry for my lack of better terminology)?
 
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Old 07-29-2013, 02:48 PM
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Originally Posted by TopHatChef
Thanks. I managed to find it just I made my edit, and you posted it looks like. I went ahead and just turned the car on and the a/c on (not blowing cold, and the compressor wouldn't turn on), and I could hear what sounded like the relays up front clicking (the row of 3 near the windshield wiper fluid reservoir. I read somewhere that they have stuff to do with the fans/compressor). It sounded like they kept clicking. Is that a sign that they're having issues 'turning on' (sorry for my lack of better terminology)?
Well then, sounds like maybe you should take apart the two connectors below those relays, one white and one brown or black. Open them up and see if there are any issues or or corrosion going on there. Just a thought.

Cheers,
 
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Old 07-29-2013, 05:08 PM
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Well, I checked all/most of the connectors in line with the relays, and everything looks good, no corrosion, no split or cut wires, no fraying.

I am getting codes 23 and 24, perhaps referring that I need a new pressure switch?
 
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