4 Function Pre-Wired Switch Box 6391104 Backlit buttons make for quick reference on the job. Concealed wiring and under-dash mount. Higher amp relay means more power at your fingertips. Available in a 4 or 6 function button layout, they can be easily installed under your dash and labeled for each use with the included labels. Pre-Wired Switch Boxes from Buyers Products offer simple control of your truck's high powered auxiliary electric devices. Featuring a higher amp relay, concealed wiring, and one dedicated fuse per switch, the 3 or 5 switches run up to 20A. There is one 40A switch per box. The rocker switches are back-lit in the ON position. Product Common Use: In-Cab Electric Controls, Light Bars and Strobes, PTOs, Snow Plows Prewired Switchbox Instructions