I have been working on a 2014 YZ450 and after I got it completely wired up it has been giving me some problems. The headlight is the Baja Squadron XL for the WR450 along with the dimmer switch that is sold additionally. I pulled power from the light grey wire that the Baja Designs harness plugs into (see pics below). First off, the bike wouldn't start after I had it wired and so I pulled everything that had power going to it and nothing happened. So then I pulled everything at the ground. Then the bike started. I plugged everything back in one by one until the ground for the headlight was plugged in and the bike died.
Does anyone have any ideas on where I went wrong on this one or what the issue could be?