Diagram how to assemble the sterling 9s-4h/c - Danco Faucet Stem

https://www.google.com/search?q=2007+sterling+lt9500+fuse+relay+box+diagram

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Limited help in the link, but the tech at Just Answer says they need a good ground.

https://www.google.com/search?q=2000+Sterling+water+truck+with+a+c7+Cat.+Starter+wiring+diagram

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Try this link.
https://s16962.pcdn.co/wp-content/uploads/2017/02/17469_Install.pdf

you can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered

Turn off the water supplying the faucet. Now open the faucet. Remove handle by taking off index button and removing screw. You may need to purchase a handle puller, 10-15 dollars, and a stem wrench set. After removing handle, place appropiate sized wrench on stem and turn counter clockwise. Before installing stem, make sure it is in the open position. You may need to use the handle to turn the new stem. Screw in clockwise.

Have you found what you needed yet.

the spring goes in first then the rubber seat goes on top.put them together first on a small screwdriver,insert on hole push down on rubber into hole it should stay.replace stem in reverse order of takeing off.