Air Conditioning Question 2000 Blazer
 

2000 chevy blazer ac replaced cycling/low pressure switch and connector had ac for 30 mins while parked in driveway. Pulled out of driveway and ac stopped functioning within a couple of minutes.
Is there a common electrical issue I should check for,
Shut truck off and star a few hours later and the ac works.
Also might be related, occasionally on startup high beam indicator is on, however I only have marker and taiights no headlights. They will come on by themselves eventually.
I found if I tap the main fuse panel under the hood on the drivers side the headlights come on and the high beam indicator goes of, I assume a bad ground, looking for suggestions
Thanx to all who might take the time to respond.

did you replace the O ring when you did the switch? If you didn't it may have leaked refrigerant out and it could just be coincidence that it stopped when you moved the car.