enn-Air Dishwasher jdb4000awb only middle washer Sprayer works, top and bottom do not? Why?

Dishwasher Repair
1

Brand: Jenn-Air
Model Number: jdb4000awb
Main Symptom: Only middle washer Sprayer works
What happens & when:

Always worked GREAT until:

Jenn-Air Dishwasher jdb4000awb only middle washer Sprayer works, top and bottom do not? Why??? (See Video)

Error Code (if any): None, it’s old, just doesn’t work.
Parts or tests already tried: Cleaned it’s filter very well, and have run through a few dishwasher cleaners through.

Photos / video link:
https://www.youtube.com/live/hiWk6USIB8I?si=hTXNfPHpYfCTZdjO

I love this old thing, be great if it could continue its great mission.

2

That’s most likely going to be an issue with the impeller assembly/circulation pump WP99002659. Make sure the feed tube to the upper spray arm and the discharge housing to the lower spray arm are clear, if so replace the impeller.
https://www.appliancepartspros.com/whirlpool-99002659-wash-impeller-wp99002659-ap6014462.html