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Registered on:2/21/2019
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So reviving an almost dead thread again..

The "park switch" may be the cause of the parasitic draw,
it's an inexpensive switch that sends a shutdown signal to the BCM. When it goes bad the dash lights do not shut off and it drains the battery.
Fords fix is to replace the whole shifter assembly at around $650.00, they do not sell just the switch.
Here is the replacement switch with an more detailed explanation of why it happens.

LINK 150-Instrument-Cluster-Repair-Dash-Light-Staying- on-fix-/292931561061