Thetford cassette toilet not wired

Discussion in 'Port-A-Potties / Cassette Toilets / Bath Houses' started by Rosebud Motel, Jun 25, 2020.

  1. GreyFox

    GreyFox Well-Known Member

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    Considering the OP's camper is a 2008 the powered cassette toilet it has is likely a Thetford C402 rather than an older C2 or C3. To establish just what these 2 wires are for my first step would be to put a voltmeter (in the DCV mode) across them to establish whether there is +/- 12 vdc and whether this voltage is always there or intermittently. If there is no voltage at all, under any circumstances, then considering the location they are likely wires connected to the toilet motor.
     
    Last edited: Jun 28, 2020
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  2. HappyTraveler

    HappyTraveler Well-Known Member

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    Been following this thread and have to say, crappers should not be this much trouble.
    Thankful for my simple, nonelectric hand pump/flush model.
    Good luck Rosebud and really hope you can get it working.
     
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  3. SteveP

    SteveP Well-Known Member

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    Is the outside light on the left side of the door as you enter the camper. If so, you should be able to access it's wiring through the cabinet behind the cassette.
     
  4. Rosebud Motel

    Rosebud Motel New Member

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    Thanks! Of course we can always just pour water down the thing, but it would be nice if it functioned as intended once in it's life.
     
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  5. Rosebud Motel

    Rosebud Motel New Member

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    Yes, the light is on the left of the door. I'll look into that idea, thanks!
     
  6. Rosebud Motel

    Rosebud Motel New Member

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    Thanks again GF. I'll dig out the multimeter and give it a whirl.
     
  7. Anthony Hitchings

    Anthony Hitchings Well-Known Member

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    99.9999999% the red and black wires are to the pump. Just put 12V to them briefly and listen for the whir of a pump motor. Then its confirmed.
     
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  8. Rosebud Motel

    Rosebud Motel New Member

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    Turns out there are black and red wires behind that outside light that had been cut. It's pretty clear now that these used to run to the toilet motor. Upon reattaching the toilet motor wires to those in the cabinet, I get no motor noise or function. I also connected the toilet wires directly to my battery to no avail. Motor must be dead. Sad face.
    Thanks again for all the helpful suggestions!
     
  9. GreyFox

    GreyFox Well-Known Member

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    I seem to recall there's a fuse in the positive wire feeding the pump - have you checked it? [?:~{]
     
  10. Rosebud Motel

    Rosebud Motel New Member

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    I have checked it and it looks brand new. I also pulled up the water pump and tried to manually rotate the little impeller in case it was stuck. Still no movement. Probably time for a new pump.
     

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