You guys wondering what DRL LOCK is....this was posted some pages back by AllBoostNoEco. Side note, if you really want to learn about ForScan and all the vernacular, you have to read through the entire thread like the rest of us. Learn to fish people. In regards to number 1. DRL Lock does work on the 15-17 Expedition. I can personally 100% verify that, as it took me weeks to get it shut off when I added my HID retrofits. The caveat is that it only works to turn the lock “off”, activating it in a vehicle not factory equipped does nothing. And there’s no reason for it, as all it does is prevent the DRLs from being shutoff in a vehicle that came with them originally. In the future, if someone who bought an ex-fleet truck (i.e., a rental) wanted to turn them off, they absolutely must change this line in the BCM in order to do so. Perhaps what is needed is a note: If you HAVE factory-activated DRLs, this allows you to shut them off. If you do NOT have factory-activated DRLs, then this line serves no function.”
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