Fuel Pump Inertia Switch -- Tripped?
Please see picture -- taken of my 1989 F-250, just to the left of the clutch pedal on the interior, this is what I assume is the 'inertia switch'. We just got truck back after fuel pump work and it was running nicely, for about 50 miles. . . then dies.
New front (high pressure) fuel pump and new rear tank fuel pump, as well as fuel selector valve/switch (OEM/Ford part). No fuel pressure at the fuel rail/schrader valve. Disconnected supply line of rear tank (yes, switch in "rear" fuel tank position), turned power on, no sound from rear fuel pump, and subsequently no fuel flows out aforementioned disconnected supply line.
Something told me to check the 'inertia switch', but I can't find anything in forum to tell me WHAT a tripped one looks like. In my picture herein, I tried to 'reset' by pushing down on the red button (as it looks 'tripped' to me).
Question: How do I reset? Does this red button push back down or pull up? I don't want to force it either way, but it does not easily want to push back in, making me think this is in the operate/normal position.
Any suggestions that could move me toward further troubleshooting the fuel supply issue? All are welcome.
Thanks in advance.