390Express
Regular Contributor
How can I test the Ohms output from the oil pressure sending unit?
I tried grounding a multi meter, disconnecting the wire from it, and reading the post, but I did not get any discernible reading. Starboard gauge and sending unit works fine. I've ordered no less than three sending units for the port engine, all with different Ohm output ranges, and nothing... I purchased the first sending unit from W. Marine based off of the make/model (1996 Trojan Express, with Crusader 454XL TBI engines) - did not read right. Tried an AMZN sending unit that stated that it matched the gauge, nothing. Tried the VDO brand, VDO recommended sending unit for the gauge, nothing...
I would like to read the ohms of the stbd sending unit, so I know which sending unit to order for the port side.
I did verify the oil pressure for the Port engine with a mechanical gauge, so I know it's not the engine that is the problem.
I tried grounding a multi meter, disconnecting the wire from it, and reading the post, but I did not get any discernible reading. Starboard gauge and sending unit works fine. I've ordered no less than three sending units for the port engine, all with different Ohm output ranges, and nothing... I purchased the first sending unit from W. Marine based off of the make/model (1996 Trojan Express, with Crusader 454XL TBI engines) - did not read right. Tried an AMZN sending unit that stated that it matched the gauge, nothing. Tried the VDO brand, VDO recommended sending unit for the gauge, nothing...
I would like to read the ohms of the stbd sending unit, so I know which sending unit to order for the port side.
I did verify the oil pressure for the Port engine with a mechanical gauge, so I know it's not the engine that is the problem.