drgndly
+1y
anone know how to wire up a pressure switch to a relay. Someone told me that u only use 2 of the 3 wires on the pressure switch. Theres a red, blue, and purple wire. He said to run 2 of them into the relay and run the power wire from the compressors to the relay. I did that and ran a power and ground to the relay but i still cant get it to turn on. O i also ran a switch in the power wire that runs to the relay so i can shut it off when i dont have the car on so it wont turn on if i get a leak. Anyone know how to hook this up. Its in a 96 dodge avenger.