oil pressure and temp gauge not working

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    • August 1, 2016 at 10:04 am #46270
      2ndchancefarm
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        I have had a lot of electrical problems over the years. (2005 Jinma 284) Right now the fuel gauge works, the tach works, hour meter works (1100) they key switch light works, and the battery light (this stays on but that is another problem. I also just replaced the whole fuse panel. When I use my electrical tester there is power at the temp sending unit and the oil pressure gauge. Is there supposed to be only one wire on the oil pressure guage?

      • August 1, 2016 at 11:08 am #46273
        oldfart2
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          My 454 uses only one wire on the oil pressureserves sensor.

        • August 2, 2016 at 3:28 am #46276
          Bob Rooks
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            Both the temp. and oil press. senders are variable resistors to ground. Only one wire required.

            Account deleted.

          • August 2, 2016 at 6:27 pm #46278
            DavidPrivett
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              if you have voltage make sure the ground is good at the gauge (close to 0 ohms) that is the other side of the circuit.

            • August 3, 2016 at 11:37 am #46281
              Piper184
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                Could Teflon tape or pipe sealant on the treads of the sending unit be messing with the connectivity of the ground?

                Try an ohmmeter between the case of the sender and a good clean ground on the engine. There should be next to no resistance.

                On my 284 (2006) tractor the oil sender had two connections. I got them reversed one time and boy did that cause goofy readings on the dash! I thought the two were power and ground, turns out one was for the oil light and one was for the gauge. (one was a switch and the other was a variable resistor) Swapped them back and all was well. They both ground through the body of the sender to the engine block.

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