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Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

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  • Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

    Reservoir pump will not come on.....Motor and tank were both purchased used from separate sellers....I have tried the following things:
    Pump will not run automatic or from the switch on the motor (key on)

    I have 12V between the connector plug (at the tank) and battery negative.....but negative is not showing up at the connector. Voltage is there at all times the key is on....but no negative in the connector

    Pump will run if I apply pos and neg from the battery, direct to terminals in the connector plug.

    I have checked continuity in the wiring between the motor and tank, all is good.

    Question: 1) is there a relay somewhere that controls the negative wire from the float and remote switch?

    2) if the previous owner of this motor disconnected the oil system, and ran it premixed, where is the disconnect commonly done

  • #2
    Re: Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

    Should have oil module that grounds the pump to run, some are part of ECU some are not, I do not know how yours is set up
    Level switch in motor oil tank tells module when to turn pump on
    level switch in remote tank tells module when not enough oil is in remote tank and stop auto fill of motor tank
    E switch should work if remote tank has oil but the level switch tells module it is low

    Some motors need to be running or not trimmed up before oil pump will run after the 1st couple of minutes of key on

    who knows what has been done to it by other people

    You will have to start testing things to see what works and what does not

    Comment


    • #3
      Re: Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

      Thanks for the response.....What is an ECU? Where is the Module located? Is there a way to test these components? I am an electrical contractor but this type of trouble shooting is out of my league.....Any help you can give is very appreciated


      Originally posted by 99yam40 View Post
      Should have oil module that grounds the pump to run, some are part of ECU some are not, I do not know how yours is set up
      Level switch in motor oil tank tells module when to turn pump on
      level switch in remote tank tells module when not enough oil is in remote tank and stop auto fill of motor tank
      E switch should work if remote tank has oil but the level switch tells module it is low

      Some motors need to be running or not trimmed up before oil pump will run after the 1st couple of minutes of key on

      who knows what has been done to it by other people

      You will have to start testing things to see what works and what does not

      Comment


      • #4
        Re: Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

        With the key on you should have 12 volt positive power to the pump via the brown wire.

        The ground is applied by either the CDI or the emergency transfer toggle switch.

        There is no relay in the system. If the toggle switch is getting a good ground reference (black wire to the switch) and if the switch itself is good, then when the switch is pressed a ground should be applied to the pump motor via the blue wire.

        Comment


        • #5
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          Re: Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66

          Wow... Thanks.....This looks like something I can comprehend and possibly deal with, I really appreciate it, I won't be able to delve into it till this weekend but this gives me a much better understanding than I had....Thanks again!


          Originally posted by boscoe99 View Post
          With the key on you should have 12 volt positive power to the pump via the brown wire.

          The ground is applied by either the CDI or the emergency transfer toggle switch.

          There is no relay in the system. If the toggle switch is getting a good ground reference (black wire to the switch) and if the switch itself is good, then when the switch is pressed a ground should be applied to the pump motor via the blue wire.

          Comment

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