cheating the a/c for extender settings?

[TurboDave]

I'm hoping somebody will have an easy answer for this one, I've forgotten how to do it.

I was trying to re set some of the parameters on my Extender, and with DS running, I noticed I couldn't access any cells that needed the A/C signal active. It used to work, so I'm assuming my A/C charge is probably gone or low enough not to allow the signal to activate.
Any body know how to cheat the system and activate the signal so the ECM sees A/C active?

TIA

 

[Eric Stage I]

Dave,

There is a pressure switch on the side of the A/C accumulator. Unplug it and shove a jumper wire in the end of the plug. That makes the computer "think" its charged.

Eric

 

[TurboDave]

Got it, THANKS.

 

[AZ Vic]

Originally posted by Eric Stage I
Dave,

There is a pressure switch on the side of the A/C accumulator. Unplug it and shove a jumper wire in the end of the plug. That makes the computer "think" its charged.

Eric

Perfect. But don't forget to UNplug it before summer gets here = blown compressor if you leave it on

 

[83ttypecooled]

hotwire

Hi,
I disagree.You can't mess up the system by shorting the cycling switch. All that will happen is that the clutch will be permanently engaged. If anything, you will freeze up the evaporator, worst case schedule.
Dale

 

[AZ Vic]

Re: hotwire

Originally posted by 83ttypecooled
Hi,
I disagree.You can't mess up the system by shorting the cycling switch. All that will happen is that the clutch will be permanently engaged. If anything, you will freeze up the evaporator, worst case schedule.
Dale

If it is not working normally, that means it is low on freon, possibly oil too. If you forget, and run it like this, there is a good chance you will blow the compressor.

I am not for sure, but I believe the switch he is referring to is the low pressure cutout switch on the accumulator and not the cycling switch as you refer to. But, say you did freeze the evaporator, then the freon is not moving properly. You could also damage the compressor that way - not as likely as bypassing the switch and running it low, but still possible.

It's at least a couple hundred if you have to change it yourself... don't forget it