This harness may also be used WITHOUT THE BLUE WIRE CONNECTED as previously stated if you are currently running a regular battery but plan to upgrade later to a Lithium battery later in your build.
NOTE: This unit is NOT FOR USE ON STANDARD 12V AGM BATTERIES. This module will increase the charging voltage by HALF a Volt and will swell and damage standard AGM batteries. Please check with your battery manufacturer to verify the proper charging voltage before installing this module!