Voltage Regulator

I was riding my 05 Iqr with a 07 600ho down the driveway and it started poping and backfireing and lost power then just quit. It would not start back up so I pulled it into the shop to see what is up. I remember reading one time that one guy found that his tail light was bunt up on his IQR and made the sled misfire. So I checked my bulb and found it was blown. I replaced the bulb and got the sled to fire and run fine in the shop. I found that the wires going into my brake swith were broke and touching each other I also checked my voltage Regulator it makes 14 volts at idle and then at 5000 RPM I'm down to 9 volts. So I ordered a new switch and Regulator. The Polaris Tech told me that it shold not have effected the way it runs unless it's back feeding. Before I found the short the Regulator show up to 20 volts!! Does any one think I have other problems? It is the stock 440 body wiring harnes and 600ho CDI enging wiring.I think I have it figured out but I would like someones input.
Thanks!!!!

Why would it not even start then a little later "after I change the bulb"
it starts on one pull??? I hate wiring I thought some how it all feeds together is that possable at all? There are so many variables I just seem to be a Electrical problem to me . I'm not questioning your knowlege I just trying to find the problem and fix it. Thank you so much for input.