Aqualisa aquastream diagnosis. Wiring diagram?

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Version 3.
Apparently it "made strange noises". and now doesn't go

POwer supply is arriving in the box from the transformer about 16VDC but doesn't appear on the motor.
So I'm looking for the wiring diagram to check the switch.
It's akward to get at, a neighbour's, and I didn't want to dismantle it just yet because it lets water through to be usable, just, and he uses the thing 10 times a day.

Can't find a diagnostic or diagram...
This should be 2 speed but it's onl;y ever been single speed, I wonder if this shower was a replacement and the old power supply transformer was used

There's a bridge rectifier on the right ( arrowed, evidently loose in the packet) and the high and low switches on the bottom pf part 2
Why a rectifier in a dc thing? Was it supposed to be full and half wave rectified for the two speeds??
Called Aq, they were useless.

1665071357565.png

Part 2 is


aqualisa-dual-speed-loom-assembly-a-stream-2003-241302-spare-part-1.jpg



So, I think that must be about it, but does anyone have a better diag or the rest of the knowledge?
 
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