My thanks to @jwillia6
for finding this elsewhere.
Hey there guys! Will from MegaOhm Motorsports
here! I finally was able to get my hands on a Lightning again for development and dug into getting rid of the Frunk Beeper that you all hate. It took my buddy and I a couple of hours to pinpoint where it was coming from and located it. Here is a picture of the "Speaker" (looks like a relay) which is actually a buzzer. Heres the best part: ITS A CODE FREE MOD! Just unplug it and go! Hope this helps a lot of you here!
The location: Hard to put in words, so here is a picture. About a foot to the right of the Passenger headlight.
How to get access:
1) Remove the Frunk - this is actually pretty easy to do. Remove the two side covers. This is where I was really impressed with some new changes. They didn't use a bunch of those 1 time use Christmas tree body pins, these ones twist to unlock, completely tool free! Once those covers are out of the way, remove the two 13mm bolts at the forward two corners. They are in a recess but easily findable. The two smaller panels next to the headlights just pull straight out, just be easy since they are plastic clips.
I think this was 6 T45 Torx bolts. The ones with the hooks have o-rings so be sure not to lose them as they provide a seal. There are 4 visible as soon as you open the frunk and 2 more under the lid.
Remove 2 of these 13mm bolts on each side of the frunk tub. This cross member is bonded to the frunk tub. On the passenger side, disconnect the tub harness connector. once disconnected you can pull the tub out. It helps to have a second set of hands to lift the tub out of the truck, its awkward and a bit heavy since its heavy fiber reinforced plastic.
With all the panels, faarrrsteners and tub removed, you can access the speaker. If you look at the first two photos in the post, it'll point out the location. Below are some shots of the speaker harness breakout. They kind of have it wrapped under the harness, and under the plastic reinforcement bar and the speaker is held in with a flimsy christmas tree fastener thats molded into the speaker. Just collapse the fins and push it through, and find a way to route the speaker out of there and finally disconnect it from the harness. Sucker was hidden well!
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