The warning device system consists of the following.
- Safety belt warning lamp switch
- Door ajar switch
- Liftgate ajar switch
- Instrument cluster
- Key-in-ignition warning switch
- Headlamp on warning
- Low washer fluid warning
- Tire pressure monitor (TPM)
- Low oil pressure
- Backup aid
- Air suspension
- Advance traction control
Refer to SYSTEM WIRING DIAGRAMS (Navigator) or SYSTEM WIRING DIAGRAMS (Expedition) for schematic and connector information.