with the new Oil Pressure Sensor in place, are either terminals "grounded"
with no oil pressure? The "switch" terminal should light up your 12V test
light brightly while the sensor terminal will only create a dim light.

Are these VDO items? I ask because I seem to remember that there might be a
similar sensor on some Audis where neither terminal is "grounded" with no
oil pressure.

JMHO but it sounds like the sensor is not correct.
later,
dave
(One out of many daves)



> jtbartlett wrote:
>> Hello group. It's been a while since I've posted but new problems seem
>> to crop up. I have installed a trio of aftermarket gauges to monitor
>> engine activity out back. Following the manufacturer's instructions has
>> been a bit troublesome. Engine is currently not firing (intentionally)
>> while I try to test oil pressure gauge. I got the handy oil pressure
>> gauge with the idiot light and pressure sensor all-in-one. The Speedo
>> lights are wired hot just like the regular idiot light. Generator light
>> works just fine. Tested the OP bulb and it lights. Oil pressure Idiot
>> light does not light. I am reading 12V at the oil pressure switch out
>> back so I thought it was a grounding issue. Ground strap is tight. I
>> can make the OP light work by removing it from the sensor in the case
>> and grounding it to the alternator nut with alligator clips. What
>> gives? If I am pulling 12V from the front of the car why wouldn't the
>> OP sensor ground to the case? There is obviously a fundamental element
>> I am overlooking so maybe a fresh set of ears can help out. Thanks for
>> any help. At this point it IS appreciated.
>>
>> PS. I do have oil pressure b/c I removed the sensor and cranked the
>> engine. It is pushing oil through. Engine was recently re-installed
>> but I haven't tried to fire it until I work this bugger out.
>