Though the degree of cooperation differs between alliances, airlines alliance is more helpful for small airlines. There are three major international airline alliances namely SkyTeam, Star Alliance and Oneworld. One of the modern alliances is that formed by cargo airlines.
The top terminal should be connected to wire #18 (low beam), the bottom right to wire #17 (high beam), and the bottom left to wire #91 (headlight to ground). I purchased my lights from a local shop, but I found that Susquehanna Motorsports has a web page with competitive prices and a nice write up about the lights.
One of the US requirements is that the beam aim must not change when a bulb is replaced. This can happen if a low quality replacement bulb is installed, because in a poorly made bulb, the filament is often improperly positioned. Headlamps are optical instruments, and Technical bulletin: H4, HB2, & 9003 bulbs.ho may use HB2 or 9003 bulbs? 9003 or HB2 bulbs marked âDOTâ may be used in the US and Canada in any car head-lamp that is marked âDOT HB2,â and in any motorcycle headlamp designed to take an H4, 9003 or HB2 bulb.