Thetford toilet

[Jamesl63]

I have a Thetford toilet in my caravan and it has stopped working
I have checked the fuse and replaced the motor that looked rusted but it is still not working
What should I look at next any ideas please

 

[birdman101]

Will help I’d you state which model it is

 

[Jamesl63]

Sorry I think it's a c402

 

[JTQ]

Can you check if the 12vDC powering feed gets to the fuse, then to the motor's connections?

 

[IanB1485]

When you say you have checked the fuse is that the one in RH side of the cassette locker? its a 3A spade type. to check this remove the flush panel and test the pcb wires/socket to see if 12V is present (red and black wires) ?

 

[Jamesl63]

When you say you have checked the fuse is that the one in RH side of the cassette locker? its a 3A spade type. to check this remove the flush panel and test the pcb wires/socket to see if 12V is present (red and black wires) ?

Yes that's the one tested fuse and it's fine

Can you check if the 12vDC powering feed gets to the fuse, then to the motor's connections?

I'll try that next thank s

 

[Jamesl63]

Ok as per previous posts I have done the following just to let you know I am still learning about the caravan and I appreciate your help on here

A I have changed the fuse for a new one 3 amp

B I have now gone inside checked with a meter and I am getting 13 volts into the toilet when I check
The only issue and I am assuming this might be my problem is the two fly leads out to the board are showing no reading I would have thought 13 volts should have been read

The board looks ok

Also I should have remembered how the board connects back I think it's sude but not sure what the two connection is for on the small side on the board is for

Thanks

 

[IanB1485]

Sounds like the wires from the cassette (where the fuse is located )to the flush pcb have suffered a common problem - corrosion(blackening of the copper conductors ) and should be replaced . RE the two connectors on the small side of the PCB , it is a universal one which is used for different versions of the toilet , for instance a remote solenoid , vent kit and other options ( see the pads near the switch which is for a 20 pin chip - not fitted). so nothing is connected to them. the edge connectors fit with the leads facing down with the PCB component side up. the attached picture show the correct way (non component side up) the supply wires are on the right , then the pump wire ( brown blue two core) and the reed switch input (black) wires on the left.

 

[Jamesl63]

Sorry as I said was new to this
On my img below the red and black both have a voltage reading
But the blue and black fly leads that had a sleeve on them have no power reading
Should they not be feeding 12 volts to the PCB board or I have I got his wrong ?