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!

 

do you have a relay by air box on fender?

 

read...http://www.lunghd.com/Tech_Articles/..._Diagnosis.htm

 

no sir the only piece of electronics over by the air box is the ECU

 

you now you have two fuse box correct?

 

hello

 

yeah i have the one under the dash and the one in the engine bay