Keep an eye on your engine's lubrication with this Standard Ignition switch, part number PS-403, an engine oil pressure switch that senses oil pressure and operates the dash warning circuit. It is a direct-fit replacement for the 1972-1974 and 1980-1983 Jeep CJ5 and the 1980-1986 Jeep CJ7, with the engine listed as All for each application.
- Part type: Engine oil pressure switch
- Function: Responds to engine oil pressure to operate the oil pressure warning circuit
- Quantity per application: 1 on each listed Jeep
- Engine: All, as listed for each application
An oil pressure switch reacts to the pressure in the engine's lubrication system. It is designed to signal the driver when pressure falls below the switch's set point. Over time, a switch can leak oil or stop responding correctly, and the warning it gives may no longer be accurate.
Signs this part may need replacing: an oil pressure warning that stays on or flickers while the oil level is correct, a warning light that does not come on at key-on, or oil seeping from the switch body. Low oil pressure and wiring faults can cause the same symptoms, so check actual oil pressure with a mechanical gauge before replacing the switch. If a failed switch is the cause, PS-403 replaces it.
Fitment:
- 1972-1974 Jeep CJ5 — All
- 1980-1983 Jeep CJ5 — All
- 1980-1986 Jeep CJ7 — All
Frequently Asked Questions
What does the Standard Ignition PS-403 do?
It is an engine oil pressure switch. It senses engine oil pressure and operates the oil pressure warning circuit, which alerts the driver when pressure drops below the switch's set point.
Which vehicles does PS-403 fit?
It is listed for the 1972-1974 and 1980-1983 Jeep CJ5 and the 1980-1986 Jeep CJ7. The engine is listed as All for each application.
How many oil pressure switches do I need?
The listed applications use one switch per vehicle.
What are signs an oil pressure switch may be failing?
Possible signs are an oil pressure warning that stays on or flickers with a correct oil level, a light that never comes on at key-on, or oil seeping from the switch.
Should I check oil pressure before replacing the switch?
Yes. Low oil pressure and wiring faults can cause the same warnings, so confirm actual pressure with a mechanical gauge first. If the switch is at fault, PS-403 replaces it.
