Damn...

So, I am wiring my new setup, and I'm putting in my tweeters and...my front right tweeter doesn't work? It might not have been working before (with the stock set up), and I just didn't notice it. I checked my wiring MANY times, they are all wired the exact same way with solid connections and that is the only speaker that won't work. It's gotta be a loose connection or something somewhere doesn't it, I'm 99% sure I have it wired right and if it's a loose connection it's in the BMW wiring and not my wiring. I'm totally stuck, what do I do?

if you have an ohm meter or a test light you could easily test the wiring, short the wires together at the tweeter and see if you have continuity on the amp side.

Weird, this is what I did and what happened...

I rewired it with the mid wiring, thinking maybe the tweeter wiring was faulty, and it still didn't work. I was stumped so I took the OEM tweeter and just used bare wire on each part of my crossovers and checked if I heard any sound. I heard sound out of all signal lines except the outs for the right Tweeter. I thought the crossover was broken, I was ready to ship it back, then I see a switch inside the crossover for DB boost (+3). Figured I'd try it and, yep it works?...

Now I don't know if it is supposed to be like that and if the tweeter is running like it's supposed to or not, in the other crossover I never touched the DB boost and the tweeter works fine. Normal, not normal, should I send the crossover back?

Switch might be bad. Send the crossover back, in case you want to adjust settings in the future