OK, today I drove around in circles form auto part to auto part stores looking for the low pressure switch and no one carries it. I also asked about the clutch relay, but AutoZone had too many options on their terminal (1.green, 2.red, 3.one wire, 4.two wires). Since I don't even know where the thing is or what it looks like, I couldn't tell the guy which one I needed. Advance AutoParts has one but has to be ordered, it'll be here tomorrow. I tried tapping the low pressure switch like you said but it didn't help.