Ford explorer xlt front end collision won't start

First check all fuses next clean the battery cables and power disribution box cable and lug next go to the engine ground and the starter cables and clean them while under the truck inspect the braided cable that comes from the solenoid to the starter case in the front if that cable/wire is broken you lost the ground connections for the starter and the engine died because of the open circuit if all is well the possibly the starter just went inside the armature or solenoid did you check battery voltage it should be around 13.5 if it's good then you can rule out that and the alternator this is strictly a starting issue from what you said in your post

thats two questions...what exactly is your concern?
The inertia switch is tripped in a collision shutting off the fuel pump, what do you mean about the anti theft?
Two systems...

Generally speaking, only Ford products have a safety switch or inertia switch for the fuel system. This includes some Mazda models.
I would start with the basics and check for power to the coil and the fuel pump relay.

Then the fuel pump circuit is shorted from the collision, you likely have to replace the fuel pump.

Yes! It should be located near the fuel pump by the gas tank, could be located near the wiring going into the transmission, or it might be behind the upholstery in the very back.

Paul,
It is impossible for me to tell you where the Inertia Switch is with certainty, as you have not included the year, & model of Ford you have. That said, most Ford models have the Inertia Switch [which controls power to the fuel pump] behind the kick panel on the passenger side. The kick panel is the plastic panel just above the outer edge of the carpet, directly in front of the front inner edge of the passenger side, front door.

sometimes you can disconect battery for a few min. and computer will reset

polarcycle is right but there is a speed sensor on the drivers side top of the trans. toward the tail shaft or transfer case. there is as well a sensor inside the trans. itself that is mounted on the web. behind the overdrive band and drum.

the filter is located along the frame near the tank. its connected in between the fuel lines leading along the frame.

Hey paul. It sounds to me like it is in the switch itself. I had a ford truck that some wiper options quit working on and it took replacing the blinker switch.