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Network Message Chart

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Network Message Chart 

Broadcast Message Originating Module Message Purpose
Gear lever position (PRNDL) PCM Indicates the gear selector lever position to the BCM. When the selector lever is in REVERSE and the ignition in RUN, the BCM provides voltage to the reversing lamps.