Excellent — that is the wiring diagram I wanted. The second photo confirms this washer uses the multi-speed motor and speed-selector circuit, so we can test this without replacing parts.
For your symptom, keep this distinction in mind:
- Normal = Slow agitation / Fast spin
- Heavy Duty = Fast agitation / Fast spin
So if by “rinse stays Slow” you mean the agitation during the rinse portion, that may be normal depending on the timer programming. What we really need to establish is whether the spin after the rinse is slow.
First test — no meter needed
Put the selector on Normal (Slow/Fast).
Run it into the final spin and watch/listen to the basket speed.
Then put it on Heavy Duty (Fast/Fast) and compare the final spin.
Normal and Heavy Duty should both have the same FAST spin speed.
If they do, the washer is operating correctly as far as the Fast spin selection is concerned.
If Normal spins noticeably slower than Heavy Duty, then we have a genuine speed-control problem and can meter it.
Meter test of the speed switch
- Unplug the washer.
- Remove the two console end-cap trim pieces.
- Remove the screw exposed at each end of the console.
- Pull the bottom of the console slightly forward and rotate the console up and back.
- Locate the speed selector behind the SPEEDS — Agitate/Spin knob.
- Take a picture of the wires before removing any.
- Pull the connectors from the switch. Don’t measure continuity through the rest of the washer wiring.
- Set your meter to continuity/beep or lowest Ω.
The terminals on your 3953144 switch are identified by the wire-color markings shown on the switch body, including W-V, OR, W-OR, BU, R-BU, Y-BU and BU-W.
What your symptom already tells us
The fact that Heavy Duty Fast/Fast works correctly is very useful. It means the motor can physically achieve its fast operating speed.
Therefore, if:
Heavy Duty final spin = FAST
but
Normal final spin = SLOW
I would concentrate on the speed-selector switch contacts and timer/speed-switch circuit, not the transmission, clutch, pump, or motor.
One thing I don’t want to do is give you a guessed continuity combination from that photograph. The contact chart in your tech sheet is visible, but the photo resolution isn’t quite high enough for me to reliably read every terminal designation.
Take one close-up picture of just the “SPEED SWITCH”/switch-contact chart on that tech sheet. Fill most of the picture with that small chart. With that, I can translate it into a simple meter table showing exactly which two terminals to probe in Normal, Heavy Duty, Delicate, etc., and what Ω reading you should get.