This switch is designed to turn on a warning light (sold separately) when fluid pressure drops below 60 psi. The single-terminal switch makes contact between the terminal and the switch body, connecting to ground. This type of switch works with any of our warning lights or any other two-wire (non-grounding) warning light.
Our oil pressure switches are rated for 100 psi operating pressure but can take momentary over-pressures of up to 500 psi. If your engine regularly exceeds 100 psi, the switch should be replaced each season for highest reliability. We also recommend isolating the switch from engine heat and vibration by using our Combination 4AN Bulkhead Mount and 1/8 NPT Adapter, Part No. 3208-02-04S (sold separately).
To install, simply run a power wire from your ignition switch to one terminal on your warning light. Run another wire from the second terminal on your light to the terminal on this switch. When the ignition is on and pressure is below 60 psi, the switch will complete the circuit and turn on the light.