Velocita Rosso Posted July 8, 2022 Share Posted July 8, 2022 My oil light has just stopped working....bulb OK and new wiring harness Am I correct in saying that if I continuity test across the switch body and terminal and it buzzes, then the switch is faulty? The ball valve inside moves by inserting a probe...but it could be worn Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted July 8, 2022 Share Posted July 8, 2022 Switch should conduct when below the pressure threshold and not conduct when above. (ie. ON at low/no pressure, OFF at higher pressure) (I think) Quote Link to comment Share on other sites More sharing options...
glang Posted July 8, 2022 Share Posted July 8, 2022 With the ignition on if you disconnect at the pressure switch and earth the wire the oil light should illuminate. If not you have a supply, bulb or wire problem. If it does light the problem is with the pressure switch.... 1 Quote Link to comment Share on other sites More sharing options...
RobPearce Posted July 8, 2022 Share Posted July 8, 2022 50 minutes ago, Velocita Rosso said: Am I correct in saying that if I continuity test across the switch body and terminal and it buzzes, then the switch is faulty? No, unless you're doing so with the engine running. As YS & glang said, the switch should conduct when there's no pressure. Quote Link to comment Share on other sites More sharing options...
Velocita Rosso Posted July 8, 2022 Author Share Posted July 8, 2022 Meant to say...with engine running...earthed to lead to bulb and light comes on...picking up a new switch Quote Link to comment Share on other sites More sharing options...
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