The easiest way to find it is turn it on and follow the noise. I have read threads where the WP is under the fridge, stove, vanity, bed, kitchen sink, a bench, or a storage compartment accessible from the outside. You most likely will find it behind a removable panel held in place by two or more screws. It will not hurt the pump if you open a faucet or let it run without water until you find it.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989
Car Shredder Op/Tech, Scrap Metal Recycling - retired
I deserve hazard pay when camping with my relatives.