2026 XLT -- DRLs but lost taillights

[ggeezer]

I've got a 2026 XLT and have successfully (?) done the DRL parking light mod using FORscan. However, I seem to have lost my taillights in the process. I've tried reloading my AS BUILT BCM from the Motorcraft site, but I can't seem to revert to the factory settings. What am I doing wrong?

I should add that the brake lights and license plate lights all work, it's just the taillights don't come on with the headlights.

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[ggeezer]

Since I've gotten no replies maybe i need to clarify: I'm using the front parking lights as my DRLs, not the low beams. The DRLs behave normally, i.e., no rear lights. Rear brake lights and turn signals operate normally. However, when the headlights are switched on (raining or nighttime) I don't have any taillights. And in the parking light position of the switch I also don't have any tail lights. What FORScan magic do I need to do to get my tail lights back to normal?