<!-- from fixya rte -->Where is the water pump in 299tbh outback - Keystone 2014 Outback Terrain 299TBH

possibly in the holding tank

Google it on Google Image.. They have the schematics online for free.

Have to have a battery most systems in an rv runs on 12v, lights, thermostat, water pump and refrigerator all need 12v to work

The pump is usually located close to the tank. (look in a compartment, under bed etc) It is pressure activated (pressure switch) so if it has already built up its pressure it will turn off / not run. One way to check this is (unhook city hose) open a faucet. --- Could be the pump is shot, or the pressure switch is defective.

no idea, but I would look very close to the water tank, maybe as part of the fill cap.

hi there.
see if this link helps you find out.
Where is the water pump on outback 250trs by keystone Google Search

One way to locate the water pump is to turn on a facet and then turn on the water pump. You should be able to hear it run as it tries to "catch up" on water flow/pressure. Look where the sound comes from. You can find the water heater from outside the RV by looking at the walls for a access door that has a screen on a portion of it. This will be the location of either the water pump or the furnace. If furnace, look for another such door.

What chassis is this built on, why do you need to do anything, it has antifreeze in it.

Isn't there a tap on your side that you might need to open ? (on the Outback's side of the hose?)