My truck just quit sending fuel after i went over the railroad tracks doin 50km wondering if it is the inertia switch or something to do with the relay? is there even an inertia switch?

There is no intertia switch, there is a fp relay in the underhood center. There should be a bypass wire to test the fp, comes out of the harness l/s near the hood hinge, comes out of the harness a red wire with a connector. You can directly power the pump from this jumper and see if it runs.