have always had futzy dials on the dash but usually after a moment controls respond to inputs. except that fan has only one speed.

maybe a few times over the last month it seemed like the ac went off for a moment or two and I assumed my fiddling with the dials a bit turned it back on.

today after blowing fine all day suddenly no more cold air. fan is same speed ac light is on and steady but I don't hear the compressor turning on. engine speed bumps up just a bit when I press a/c to on but no cycling from the compressor.

where do I bypass the switches/relays to see if the compressor is still functional.