Posted July 22, 200915 yr Hi all, As I posted earlier my oil press. switch is not working. I took it out and tested it with an ohmmeter today and I got about 40 on the R x 1k scale. I'm not sure if it's normal or not. Since there's no pressure the contact should be connected (grounded), hance, the ohms should be close to 0 (current can go through, lite up the indicator) . Am I right?
July 26, 200915 yr Hi all, As I posted earlier my oil press. switch is not working. I took it out and tested it with an ohmmeter today and I got about 40 on the R x 1k scale. I'm not sure if it's normal or not. Since there's no pressure the contact should be connected (grounded), hance, the ohms should be close to 0 (current can go through, lite up the indicator) . Am I right? Assuming it is a switch driving an oil warning light, and not a transducer driving an oil pressure gauge, you are correct. The switch, when under no pressure, should measure no more than a few Ohms. Under pressure, it should be open, or infinite Ohms. It is likely your switch's internal contacts are worn out.
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