The cluster is ready to install, without any modification to the rest of the truck. If it ever gets replaced with an unmodified cluster, the new cluster will work normally.
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On F-series with dual tanks:
This module is designed to prevent sudden changes in the needle's position while the key is in RUN. So when switching tanks, it will take some time (~3min)for the module to accept the new level & allow the gauge to display it, UNLESS the key is cycled OFF. So to make this mod more functional, simply apply insulating tape to the module's output terminal and leave the signal loop of the film circuit intact. This will eliminate the anti-slosh feature, but still allow the low fuel light to work.
See the PREVious & NEXT several captions...