bluejeep2001

Have you removed any ac electric component like a relay or fuse..? There is only 1 fan relay driver and we know that works/ or did...need to verify that. With the low pressure switch jumped to good, and the clutch engages the fan should come on. Jumpering the high press to hi should disengage clutch but keep fan running. My wiring prints selection process only has CHEROKEE 2wd or 4wd and 4.0 and 2.5. No option for RHD or LHD. Don't know if this matters

Roler

Might as well continue in this thread (no intention to highjack it though, it just might add some info for future reference). This is the part relating to the fan operation, not my AC not working, to clarify,

Allas, this didnt work. Finally been able to spent some time with it today.
So what I found:

My LPS has no continuity - so either the switch is bad or the pressure is to low (I think its the pressure, see below)

So jumpered the LPS connector (HPS remained connected) : AC clutch + fan come on.
Next, LPS jumpered and HPS jumpered: clutch and fan come on (I couldnt measure if the HPS itself has continuity due to the awkward position it's in in the RHD but this tells me it behaves the same as when the HPS is just connected, so the HPS is normally closed- and then should open/ no continuity is the pressure goes beyond its threshold )

OK- so the theory was that, if now the HPS was to be no longer jumped/disconnected/no continuity, the PCM would see it as too high pressure and was to disengage the clutch and the fan would stay on. However both clutch AND fan stop (so when the LPS remains jumped and the HPS is now 'open'). It appears the fan is not being managed separately from the AC clutch by the PCM. That, or, this is different for some years.


For completeness I completed all the other measurement combinations including LPS not jumped and the HPS jumped but all those other measurements don't bring on either the clutch or the fan.

Looks like I'll need to go down the remote fan switch option after all...

bluejeep2001

last chance for simple fix..the ac clutch is not monitored by anything. you can disconnect the clutch connector and keep the hi and lo press switches jumpered as needed to "engage" the clutch and fan. you can also try and pull fuse 9 (20A) in pdc does the same thing...but fuse 9 also drives a circuit called overhead module, if you have one. then you need to disconnect clutch, if not then simply pull fuse. see print 8w-42-5 and 8w-10-12 sends you 8w-39-2/5 cant find it so we might not have it. Oh yes, the only reason we needed some a/c info is on your model to drive the fan...you needed some critical a/c components showing the proper signals to get the fan to drive.

awg

Mine had a busted wire, some r$%^&d made a bodgy harness with 2 thin black wires

I have remade the harness with correct thickness red and black wires

Now that my hand works, I can fix things

I was previously jumping out and hooking a wire to run it when it got to hot, which was rare, only of you got held up idling for +5mins

Roler

Other than the small console that has a cabin light and two reading lights, the only overhead console I have is this:

bluejeep2001

Find out which works best/ easiest. Undo the clutch connector and see if the fan comes on when you select an ac mode with your pressure switches configured properly. Then reconnect connector and pull fuse 9 . See if any adverse effects. Choose which method gives the desired results