Would imagine relay is under hood w/engine fuse block there. Pump in tank of coarse, pump should prime or run without pressure if siphoning (most have return line to tank on older cars). Should just be able to turn ignition key (to run- not start) as pump is supposed to run prior to startup for priming engine.

Watch out for fire, many have burned up their car, garage doing as such. If car being junked, buy one of those hand siphons, maybe $6? Put siphon intake in fill tube or cut fuel line and install below filler neck. Ground yourself as static electricity prevalent in winter.

Your welcome WMG, I would not want to leave them any gas either. Try to do same thing when trading cars but make sure tank is full leaving dealership.

One time was cleaning my Plymouth road runner engine with this electric motor cleaner. Could immerse a running motor in the stuff and no problem, was called safety solvent. Well started up the engine and a spark from the alternator brushes- entire motor was on fire lol. Garden hose handy, put out fire and no damage at all. Was quick enough to put out while only the solvent was burning off, so much for safety solvent though:) if it could of happened it did to me one time or other.

I'm probably paranoid these days myself. Fire extinguishers all over the place and have a Purple K one out in garage even. To top it off I was licensed as fire protection inspector in ME and inspected/maintained all these AFFF hangar systems, halon, wet/dry pipe and CO2 systems at Naval Air Station, Brunswick, ME. Set one off once and took my time exiting building. Was like walking through Alka-Seltzer, can kill pretty quick as Carbon Dioxide removes all oxygen.

Maine has many wood stove fires too in winter. Those are always bad and you wonder if could of been prevented. Was legal in state to have wood and oil furnace piped using same chimney but staggered connections. Draft had to be adequate of coarse but no creosote as chimney was always warmed from oil burner. Not legal anymore since Ice Storm '98, they screwed that one up. To this day mine still works great, I have extra tall chimney anyways. https://en.m.wikipedia.org/wiki/Purple-K