[Dave at Pelican Parts]

What kind of fuel system does it have? Carbs or injection? If injection, is it D-jetronic (silver grenade-like thing over on the right wall of the engine bay with one vacuum hose and one wire bundle going to it) or L-jetronic (air cleaner over on left side is bolted to a small box with a quarter-circle 'bump out" in the side of it)?

All of those control the fuel pump differently. With carbs, you're at the mercy of whomever converted it over. The power comes from whatever they wanted to hook it up to.

D-jet has the ECU switch on the fuel pump relay which lives on the relay board. Happens when the starter is engaged, when the engine is running over ~100 RPM, and also for ~1.5 seconds when the key goes from "off" to "on".

L-jet hooks the pump up to the "double relay" that hangs off the battery tray. A switch inside the air flow meter runs the pump when the vane in the meter gets moved by incoming air. The starter circuit is also hooked up to trigger the fuel pump section of the dual relay.

The particular system you have will determine which direction you start troubleshooting in.

--DD