These locations are also subjected to vibration and harsh weather and environment, resulting in shortened service life. FIX/SOLUTION: The Fleece Performance Charging Circuit Harness is a drop-in replacement to replace a failed factory harness causing an intermittent or illuminated charging circuit MIL on the dash. The harness installs directly in-line with factory connections with no cutting or splicing and allows you to reroute the alternator connection along the top side of the engine, avoiding the unprotected channel routing on the underside of the engine. Application Notes: Fits 2011-2016 Ford F250/350/450/550 with 6.7L Powerstroke.