[Rich Biebel]

Oil pressure switch is located behind the front sheet metal just above the oil filter. If you have no spark during cranking it is not likely the OPS. as the control board is responsible for cranking functions but it's easy to test. There is a white wire that comes from that switch and gets connected to the control board. It is usally directly under the front panel and comes up from the left side. Unplugging it and trying to start it is safe. I have never seen one actually lose oil pressure.....the switches occasionally go bad but they usually start and shut right down if the switch is bad.......If you unplug the OPS and there is spark from a plug wire......the switch is not to hard to replace in the MH........