2008 motor home on a 2007 ford chassis ford v10 egine cranks but wont start

Check for fuel pressure. Commonly fuel pumps are changed when the inertial switch may have tripped. Google ford inertia switch. It is a resettable safety device for the fuel system.

Fuel pump relay or a FPDM - fuel pump driver module , or the inertia fuel cut off switch was tripped . F150 Expedition No Start P1233 Fuel Pump Driver Module How to test an electric fuel pump no fuel psi testing Ford

Battery junction box , under hood ! Fuse # F13 20amp. The fuel pump relay is in same box . Do you know what a relay is ?

What year? Inertia switch tripped. Fuel air spark compression. I have seen inerta switches plugs pulled out on the passenger side floor board many times. People's feet.

Power goes from the fuse box to the fuel pump relay to the inertia switch and then to the fuel pump motor.I would suggest bypassing the inertia switch for now just to see if you can get the vehicle started and go from there. FYI The inertia switch is just there in case you get in a collision and shuts fuel off. Good Luck

If it has an inertia switch, it should be on the passenger side near the door.
I would first check the pump relay to see if it is sending power to the pump thru the switch. And do you have a switch for dual tanks ?

Check the inertia switch. That switch kills everything.

Also, make sure you don't have any "theft" codes as this will also not allow the pump to turn on.

Assuming you checked fuses and are getting juice at the pump wire.

Don't need to say it but I will. Never check a used fuel pump outside of the vehicle. They do blow up!

did the inertia switch get tripped while working on the window switch? also make sure you have power to the fuel pump past the inertia switch.

Hello You will have to reset your fuel pump switch located passenger side right foot kick panel when you press it it should stay down if this does not work your probably looking at a fuel pump not working.

Good info on the PATS / theft light. Looks to be the PATS / HEC operation is functioning correctly

The Fuel inertia switch only cuts power to the fuel pump, so if tripped, the truck would have a crank no start issue. Do you have a crank no start, or no crank issue.

To reset, just press down on it. To check if the switch is tripped, check for power at the connector to the fuel inertia switch

Engine compartment fuse # 10 ( 20A ) to the fuel pump relay -> Dark Green w/ yellow stripe wire to the fuel inertia switch -> pink w/ black stripe wire to the fuel pump module.
Check the pink w/ black stripe wire to ground with a meter for power, with the key in the run position.

If you turn the key from off to run ( do not start ) you should hear the fuel pump cycle ( hum, then turn off ).

Could be an issue with the fuel pump relay ( my '01 had a crank no start at ~ 35K miles, bad fuel pump relay ). I proved this out ( after a stupid ID10T error in my diagnoses process ) by jumpering the normally open contacts in the fuel pump relay socket, and then installing the trailer tow reverse circuit relay into the fuel pump relay socket ( same full size Ford Relay ).

Jumpering the fuel pump relay in the relay socket ( remove relay and use jumper wire ), red line


If you have a no crank issue, could be the DTR ( Digital Transmission Range ) sensor on the driver's side of the trans is out of alignment.

Check the start motor relay ( on the firewall on the passenger side ) for power on the Tan w/ Red stripe wire when the key is in the start position ( this is from the ignition switch through the DTR when in park or neutral to the starter motor relay ).

You can test another route, turn the key to the run position, and apply power to the Tan w/ Red stripe wire on the starter motor relay in the engine compartment on the firewall. BE CAREFUL, the motor should turn over, keep clear of moving parts.

Post back a comment to this problem with the results of the testing.

Thanks

Sounds like fuel pump going out. I was told by a friend that the pump can get stuck and that by knocking on the fuel tank or by attempting to start that it can kick the pump out of the bad spot and it will start. But it is a sign that it needs to be replaced.