Investigation with a volt meter is in order. So is a set of factory Ford shop manuals(normally available on Amazon for under $100) The manual will show you exactly where to take voltage measurements, and what to expect. Without the manual, I'd at least try to measure the voltage at the plug for the pump, on top of the tank if internal, or along the frame rail. If no voltage, you might be able to fire the pump with a jumper directly from the battery just as a test.
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Arctic Traveller
KC6TNI
2001 GTRV
Advanced 4wd
Agile Ride improvement package
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