I changed the oil pressure sending unit from the stock dummy light one to the gauge style. I then swapped the gauge cluster from the dummy light to the gauge style and the gauge worked. My question is this, I have to finish assembling the gauge style cluster so I just threw the dummy light one back in for a couple days and I've now got an oil light on. Just wondering if this is just because I switched from the switch type to the gauge type or if somethings wrong? I thought the old dummy light type just was on or off and that's why I thought the new style might have thown the light due to the fact that there is power at all times being that it's for the gauge.