Oh sorry bout that. The way I was reading it made it seam more in depth and possibly damaging to the system. Good to know.

 

If you do it for just a second even an empty system, no damage will be done to the compressor. I am certified in A/C, 134a systems can be done by the home owner, you can buy the freon and add, they have high and low switches so you cant over charge a 134a system, it just will shut the compressor off, if the system is empty and you see a hole or broken line, unless you have a vacuum pump that will reach 29.8 inches of vacuum than you need a pro to do the evacuation. moisture in the system will give you problems down the road, not worth it, make the repair and bring it to a qualified shop and let them pump it down for an hour, that will remove all moisture and they can even add oil with a dye that shows up on a blue light, so in the future you can check for leaks yourself. The newer systems the A/C is controlled by the ECU, and it monitors all kinds of info, outside temp, evap temp, low and high side pressure, compressor rpms, those you just cant jump out a switch and see if it's low, but you can see with a scan tool what the pressures are. sorry just rambling on. I think you have a good idea of what you have to do. the compressor is good, clutch and coil are good, just need to get power to her, I bet she is low. My 2 1/2 cents.

 

Yes , might be helpful , I jumped the compressor and hooked ac guage it was reading 40 psi , a/c also blew nice and cold while I had it jumped . would there be potential dangers on running it jumped ??? . also I can seem to find a bad fuse so what could it be maybe the cycling sensor ???

 

Anyone have the wiring diagram I'm going to chase the wire back to fuse panel to see if maybe the wire got spliced from previous owner . I got this truck blindly not knowing the issues with it so it just trouble shoot and fingers crossed . but it seemed fine when I jumped wires . what I did was grab a negative and positive and clipped them to the compressor itself . the guy at advanced said its the sensor more than likely . the sensor that is on the low pressure side right beside compressor .

 

OK I just ordered a new cut off switch for the low side to see if that was the issue we will find out tomorrow 😑

 

I'm going to go out on a limb and guess your system is undercharged.

 

Poor man's quick and dirty way to check charge, Run AC with slightly elevated idle, grasp line at bottom of evaporator and line at top of evaporator. If bottom is cold and top is warm it's low. Same principle as those stick on thingys they used to sell.

 

Wiring Diagrams, though for a 2000, should be the same.

Pop

 

OK my low pressure switch came in today and I installed it ! The compressor kicked in , shortly after kicked out I checked freon and it was really low . so I tapped the clutch plate with a screwdriver it kicked back on and I added more freon . my psi is right at 33 I'm going to buy another can and bump it up to 40.I appreciate everyone's help !!!

 

Here is how I charge mine...to revamp an old thread now that it is hot EVERYWHERE!!!

@50-55 psi on the low side then 100 + the ambient(outside) temp. on the high side. So if it is 85 degrees outside your high side should be 185 psi.

Now my wifes Tahoe blows damn near ice at 45 psi and the same principal for the high side.


My 2 cents...