Adapter Kit 28027-3.* This is the newest version. They now have sealed relays.
This is an inline adapter that disables the low beam. This way the high beams are on in a truck that runs both lights at the same time. If you are moving your wiring over to a newer truck that runs this way, you can use this adapter in line rather than buying a new kit. This can be used for Fisher, Western, Blizzard, and SnowEx.
This is a direct replacement for the older 28027, 28027-1, and 28027-2.