The Painless Performance®™ 21 Circuit F-Series Ford Truck Harness is designed using original Ford OEM color codes, contains detailed installation instruction for each year of vehicle covered, and includes pre-terminated wires for an easy installation. Preterminated sections include headlight switches, headlights, turn switches, the ignition switch, wiper switch, instrument cluster, blower motor, and voltage regulator. Each wiring harness includes a full color manual for fast easy installation.