MSC11201 Boss LED Negative Switch SL3 Relay Adapter Kit for Positive Ground Vehicles

Boss Plow Headlight Negative Switch SL3 Relay Kit # MSC11201. This is used on vehicles with a positive ground, to install plows with the new SL3 LED headlights. LED lights will not work with a positive ground so this flips it so the lights can function. 

This kit is applicable to many vehicles including those listed below:

2000-2006 Toyota Tundra SR/SR5
1999-2002 Dodge Ram 1500-3500
1999-2002 Dodge Dakota
2000-2003 Dodge Durango
1999-2002 Chevrolet/GMC1500-3500
2004-2013 Chevrolet Colorado
2004-2013 GMC Canyon

Here is a link to the Installation Instructions. 

To make sure this is what you need for your truck, check Boss' Power Match.