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95XJ A/C Clutch and Elec. Fan Not Turning On

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Old Apr 14, 2012 | 05:05 AM
  #1  
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Default 95XJ A/C Clutch and Elec. Fan Not Turning On

hello all, ive been in the jeep game for about 5 years and are pretty familiar to normal jeep issues but this on is stumpin me big time!

Background: 95 xj 4.0 auto,130xxx, not hard miles
one day the ac wont turn on and the electric fan wont turn on

ive tested the basics:
electric fan works with 12v
ac clutch switched on with 12v
low pressure switch ok-bypassed to double check
relays themsleves are ok- each one has been tested

notable oddities:
the electric fan does NOT turn on when i unplug the thermostat housing temp switch, the check engine light comes on but the fan does NOT turn on

im running out of ideas, i think next plan of action would be to take the PCM out and check wires and corrosion

any help would be appreciated!
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Old Apr 14, 2012 | 05:12 AM
  #2  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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do you have a relay by air box on fender?
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Old Apr 14, 2012 | 05:26 AM
  #3  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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read...http://www.lunghd.com/Tech_Articles/..._Diagnosis.htm
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Old Apr 14, 2012 | 05:36 AM
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no sir the only piece of electronics over by the air box is the ECU

Last edited by 95BlueXJ; Apr 14, 2012 at 05:37 AM. Reason: spell check
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Old Apr 14, 2012 | 05:37 AM
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From: Broward County Fl.
Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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you now you have two fuse box correct?
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Old Apr 14, 2012 | 05:41 AM
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Year: 1989 xj sport 2dr
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hello
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Old Apr 14, 2012 | 06:59 AM
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yeah i have the one under the dash and the one in the engine bay

Last edited by 95BlueXJ; Apr 14, 2012 at 11:59 AM.
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