93 Ford Mustang, was running great. No issues. Ran and drove great last time I drove it.. Then, all of a sudden after sitting for a few days, won't start. I noticed that the fuel pump is not engaging. I checked the fuel pump relay. It's good. I checked the inertia switch. It's good. I'm getting 12 V at the inertia switch when I turn the ignition switch on. But, when I turn the key on, it shows 12 V for a split second on the Green/Yellow wire at the inertia switch, then it drops to...

93 Fuel Pump not engaging