Hoping someone might be able to shed some light on a problem I’m having with the toilet flush on our Bailey Pursuit 430-4.
The flush button no longer operates the pump. I've already tried a few things:
Checked for a fuse – from what I can tell, this model doesn’t have a dedicated fuse in the cassette area. I believe the flush shares a fuse with another circuit (possibly water or lighting?), but nothing is obviously blown in the main panel.
I used a multimeter on the wires going to the flush pump (accessed via the sticker covering the PCB terminals).
- I get a voltage reading there, but it's lower than 12V (haven't checked battery state yet), and when I press the button, the voltage drops down.
- The pump doesn’t move at all — no buzzing, clicking, or signs of life. - The pump (wet end) does move freely and isn't seized.
- No lights dim, and everything else in the van seems to be functioning normally.
- I haven’t yet tested the pump with a direct 12V feed from the leisure battery, but that’s next on the list.
A couple of questions for the experts:
- Is there a known shared fuse or relay for the toilet flush on this Bailey model?
- Does this sound more like a failed PCB, or a dead pump motor?
- Could it be a wiring issue (e.g. poor negative return) causing the voltage to drop under load?
Would appreciate any wiring diagrams, known fault tips, or suggestions before I start pulling things apart!
HI, I would certainly check battery first,if you're getting a reading less than 12v then that's indicating a discharged battery which won't help checking the fault. Also if you have a reading at pump wiring that alters when button is pressed suggests to me fuse and switch are OK and would be thinking towards faulty pump. If you search on YouTube might find a video on there regarding this fault but check battery first.
We didn’t do any battery checking when our Thetford pump went silent. Changed the fuse, no difference. Did a search on the forum, looked at YouTube videos for confidence, opened the cover, took out the pump & tried to free up the impeller blades. You might be able to free up your blades by moving them, then trying the flush pump again.
But we hadn’t used the toilet for years (use site facilities) & the blades were seized solid. Got a replacement pump (not the expensive Thetford part, an identical much cheaper one), had to cut wires (and obviously seal them), but the pump has worked perfectly since for an hour’s time & effort and not much cost.
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Topic: Pursuit 430-4 – Toilet Flush Not Working
via mobile 22/7/2025 at 9:48am
