When I start the truck it will start, but when I turn the switch off why does the starter continue to kick in?

Remote Starters have to bypass the anti-theft software. disconnecting the battery, broke the programming. You will need to take it back to the installer.

1 trick to try is this. Turn ignition to run, disconnect battery negative terminal on battery, leave the ignition on for the entire time. Wait 1 hour than re connect battery with the key still on run position. Try to start car, if it starts and runs OK and doesn't shut back than it could been in brain lock. Turn off car and rearm security system. wait about 10 minutes than insert key and start if it continues to run than your probably OK. If it rearms starter disconnect than chip in key or the ring around ignition switch is bad. In that case a dealer will need to replace the part and re program the security system to accept the new part.

There maybe a problem with starter motor? Some of the national brand auto stores will test starter for you. Of course, you have to take it off and take it to them.


You could take the starter off, lay it on the ground, Hook up jumper cables properly from starter to battery. The starter should kick-out the drive gear and spin. If starter drive gear kicks out and in, something is wrong. Anymore I replace starter solenoid and starter motor as an assembly.

It wouldn't hurt anything to check flywheel teeth while your at it.

the start relay is sticking or the selenoid on the starter is stuk

It has a ign. switch usally on the steering colum I would say it is going bad. Does it do it every time? Does it try and kick back in when you hook the battery back up when it is running? It's possible it is sticking in the flywheel but if it quits by un-hooking the battery I would bet on the Ign.switch not the key switch.

SECTION 303-06: Starting System 2003 Expedition/Navigator Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 11/06/2002 Starter Motor Printable View (188 KB) Removal
WARNING: When carrying out maintenance on the starting system be aware that heavy gauge leads are connected directly to the battery. Make sure protective caps are in place when maintenance is complete. Failure to follow these instructions may result in personal injury.

1. Disconnect the battery ground cable.

1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the RH kick panel area. Failure to do so may result in unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations.
   Raise and support the vehicle; refer to Section 100-02.

1. Remove the starter motor solenoid terminal cover.

1. Disconnect the starter motor electrical connections.

1. Remove the starter motor.
   1. Remove the stud bolts.
   1. Remove the two bolts.
   1. Remove the starter.

Installation
WARNING: When carrying out maintenance on the starting system be aware that heavy gauge leads are connected directly to the battery. Make sure protective caps are in place when maintenance is complete. Failure to follow these instructions may result in personal injury.

1. Install the starter motor.
   1. Position the starter.
   1. Install the two bolts.
   1. Install the stud bolt.

1. Connect the starter motor electrical connections.

1. Install the starter motor solenoid terminal cover.

1. Lower the vehicle.

1. NOTE: If equipped with air suspension, reactivate the system by turning on the air suspension switch.
   Connect the battery ground cable.

this is a stupid idea but one of my co-workers have a 98 explorer and she lost the chip in her key. after that it still wouldnt start turns out the anti-theft kicked in and they had to reset the fuel shut off switch. your battery replacement maybe did the same? not sure where your switch is but hers was up under her passenger side floor board up front somewhere around the kick panel it was a purdy red button

Yes, there is a starter relay which is most likely the culprit.

Trace the red battery cable, you'll find the relay at the end of it. Disconnect the starter cable and the battery cable, but not the ignition switch leads, from the relay. Then test for continuity through the switch side of the relay when the ignition is turned to start.

If there is no continuity, the relay is bad.

More info, let me know.

Charlie

Pulling the battery is fine, I would suggest the remote starter or the ignition switch are bad. Its not the solenoid if it starts the car, solenoids default to off not to on.

The click you hear is the starter relay. Check for continuity thru relay with battery negative cable disconnected and switch in start position. If no continuity, it probably has burned contacts. Sometimes these can be taken apart and contacts filed/sanded cleaned.