2001 Non-Remote Alarm Problems
 

Greetings:

Have a 2001 F150 Lariat - Have several remotes, all with new batteries. Have trouble turning on or off and locking/unlocking doors. Since I have several remotes/transmitters I think the problem must be with the receiver in the vehicle??? Can anyone offer tips/what troubleshooting steps I shoud take? Location of factory alarm unit?

Thanks,
JP