3rd wire on inertia switch????

[cannonfodder]

What is the third wire for on the inertia switch? Thanks

 

[RonD]

1 Wire from Fuel Pump relay
1 Wire to Fuel Pump
1 Wire to Computer

Computer makes sure inertia switch/fuel pump is getting the 12volts when it activates the fuel pump relay, I assume that's the 3rd wire you are talking about.

And this wire can show 5 to 7 volts when key is on and fuel pump relay is off, it is just monitor voltage, no amps, so doesn't power fuel pump, even a little, lol.