The DEI 457C Interfaces with the 1999+ Jeep Grand Cherokees and many other Chrysler vehicles
that now also use a Databus system
to control the door locks and vehicle's alarm arm and disarm functions.
Note: The DEI 457C replaces the previous DEI 455J Interface Module.
The 457C converts the signals from keyless entry, alarm, and remote start systems
directly into signals that can be understood by the vehicle's data bus system.
This allows interfacing with the factory security and lock system
through the existing factory data wire in the vehicle.
457C INTERFACE GUIDE
The 457C controls the door lock operations including locking, unlocking,
and driver's door only unlocking. The 457C also provides control of the factory security system.
The factory security system can be armed and disarmed when locking or unlocking the doors,
or disarmed when remote starting without unlocking the doors, so the vehicle remains secure.
The 457C also operates the smart dome light integration on some vehicles.
The DEI 457C harness wires connect to the DEI (or other brand) alarm, keyless entry,
or remote start CPU Door Lock / Unlock Outputs.
Then connect the DEI 457C Data Bus Output to the vehicle's Data Bus wire
at the Diagnostics Connector located at the bottom of the dash on the driver's side.
That's it! It's that easy.
