WA80V3 wiring diagram for Samsung Top Loader - Samsung Washing Machines

https://www.allrepairmanuals.com/whirlpool-top-load-washer.htm?model_number=GSW9650LW0

Just parts and harness parts

https://www.google.com/search?q=Whirlpool+Gsw9650lw0+Wiring+diagram

You could also search for videos showing whatever job he was doing and pause the video.

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Google

make model wiring diagram

Many machines have the wiring diagram hidden somewhere. With a top loader it is hidden on the control console. With a front loader behind the kick plate.

yes
put the cloths in select a water level put a couple of buckets in the tub and turn the machine
keep adding buckets until the machine goes to was
bit more difficult if front loader but remember this , you will use the same amount with a bucket as you will through the tap for the machine

The attached link should help you out. http://www.appliancerepairlesson.com/2015/05/08/ie-error-code-samsung-washing-machine-fixed Washing Machine Repairs Central Coast NSW

Their may be something in the line, leading to the pump restricting the flow to the pump.

You may download a copy of the manual at http://downloadcenter.samsung.com/content/UM/200907/20090702180735218/DC68-02594G_EN.pdf

sounds like the drain pipe is too low resulting in Syphoning of water lift pipe above 24 inch floor level, this should cure...