Re: need help, oil can light is on. i cant run my CAR... (germanrox)
Low oil pressure warning system:
With the ignition off, the low pressure switch is closed (complete circuit to ground). When the ignition is turned on, the indicator flashes (no oil pressure). When the engine is started and oil pressure rises, the switch opens and the indicator goes out. With insufficient oil pressure or a stuck switch, the indicator will continue to flash. The switch opens and closes at specific pressures.
To quick-check the low pressure switch, simulate a closed switch by removing the blue/black wire and grounding it. With the ignition on, the indicator should flash. If not, the problem is in the circuit or the indicator. If the indicator flashes only when tested in this way, replace the switch.
If the indicator flashes with the engine running, and the oil pressure tests ok, remove the blue/black wire from the switch with the engine running. The indicator should go out. If not, the circuit is shorted to ground between the wire and indicator. If the indicator does go out, the switch is stuck closed and should be replaced http://****************.com/smile/emthup.gif *whew*!!