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SN95 Cobras
Oil Pressure sender.
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<blockquote data-quote="mwolson" data-source="post: 14394850" data-attributes="member: 16006"><p>With the key on, unhook the OP sender wire and leave it disconnected. Your OP gauge should go to low oil pressure. Ground the sensor wire and the gauge should read in the high-normal range. That tests the gauge.</p><p></p><p>To test the sender, with the sender wire unhooked and the engine off, use an ohmmeter from the sender post to ground to check for a very high (infinite) resistance. With the engine running, do the same test and you should see very low resistance, close to 0 ohms, since it is a pressure switch.</p></blockquote><p></p>
[QUOTE="mwolson, post: 14394850, member: 16006"] With the key on, unhook the OP sender wire and leave it disconnected. Your OP gauge should go to low oil pressure. Ground the sensor wire and the gauge should read in the high-normal range. That tests the gauge. To test the sender, with the sender wire unhooked and the engine off, use an ohmmeter from the sender post to ground to check for a very high (infinite) resistance. With the engine running, do the same test and you should see very low resistance, close to 0 ohms, since it is a pressure switch. [/QUOTE]
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