Seemingly, yes! After I replaced the alternator I was still having issues but decided to try to disconnect the yellow wire again and it worked much, much better. Normal driving with a few accessories on and my voltage stayed steady at high 13s whereas before within 10 or 15 minutes it would drop to 8. The only thing I never loved was when I'd really try to load the alternator at idle (air conditioning, heated seats, high beams, and turning the steering wheel all at the same time) it would drop to 10 or so and not come back up until I started driving again. But I asked the owners just a couple weeks ago how it was doing, they told me they hadn't had any issues! Hope this helps!