Jumping Pressure Switch

[philipk65]

Hi,
I'm trying diagnose my '91 Chevy S-10 R12 issues. I'm waiting on a GM high side adapter to test pressures.
But in the mean time, I jumped to lower pressure switch and the compressor kept running.
What does that indicated?
Thanks Kevin

[Dougflas]

That may indicate that you're trying to ruin your compressor. You need to monitor both lo and hi sides.

[philipk65]

I read online to jump the switch and see if the compressor runs... I did it for 3 seconds.
What does that tell me?

[philipk65]

Like I said before!... I'm waiting on an adapter to test both side.

[Dougflas]

Your original post stated that you jumped the switch and compressor kept running. Get both gauges installed and then come back with info.

[philipk65]

O.K. here are my pressure readings...
at 79 degrees outside temp.

High side- 100 when compressor off and 110 when it runs (on and off ever 3 seconds)

Low side- 94 when the compressor is off and 97 when it runs (on and off ever 3 seconds)

Whats the probable cause for the cycle rapidly?

Thanks!

[Tim]

Have you checked for leaks and repaired them?

[philipk65]

Yes, no leaks.
I think I misread the gauges before. I checked them again.
low side - 40 (compressor off) 21 (when compressor is on)
high side - 102 (compressor off) 120(when compressor is on)
cycles rapidly....

[bohica2xo]

The answer will depend entirely on which engine is in the vehicle.

[philipk65]

4.3 L v6