Testing Oil Pressure Sensor?

[idoari 10]

how can i test the oil pressure sensor off the car (like with ohmmeter)?

i have ph2 205 gti 1.6 and when i insert the key to the ACC mode the oil pressure gauge is going to the max and when i start it it going to zero and the oil pressure light in the gauge is illuminated.

how can i know for sure that i don't have oil pressure and the sensor is fine?

 

the engine is after a major electrical rewiring and when i first turn it over it doesn't ideal smoothly at all and it keep stole if i remove my leg off the gas (it could be because i have a huge vacuum leak in the hose after the MAF).

 

please help

thanks

Ido

 

 

[welshpug 1,661]

sounds like you have the wires mixed up on the switch and sensor