Wiring Guide – Ford
2015-Current F150
3rd Brake Light Wire Connection (CHMSL) Hot wire location
Location #1: Under the driver side kick panel. The wire is purple/white in color. You will need to remove the factory black tape to expose the wire.
Location #2: Under the driver side hood. The wire is purple/white in color.
Connect the red (+) wire on the brake light to this wire. Connect to clear (-) wire to vehicle ground anywhere on the METAL FRAME (not body) of the truck.
1997-2009 F150
3rd Brake Light Wire Connection (CHMSL) Hot wire location
Location #1: Under the Passenger’s side step plate. The wire is light green in color.
NOTE: On ’09–Current models, CHMSL wire is located under hood on driver’s side, also light green.
Connect the red (+) wire on the brake light to this wire. Connect to clear (-) wire to vehicle ground anywhere on the frame or body of the truck
2019-Current Ford Ranger
3rd Brake Light Wire Connection (CHMSL) Hot wire location
Location #1: Red wire on the driver’s side tail light. Remove the tail light and find this wire on the pigtail behind the driver’s taillight.
Location #2: Above the brake pedal. The wire is white in color, with purple stripe.
Connect the red (+) wire on the brake light to this wire. Connect to clear (-) wire to vehicle ground anywhere on the METAL FRAME (not body) of the truck.
1993-2012 Ford Ranger
3rd Brake Light Wire Connection (CHMSL) Hot wire location
Location #1: Green wire in the factory wire harness beneath the center console.
Location #2: If the green factory CHMSL wire is not present in this harness, remove the driver’s side step plate and locate the green factory CHMSL wire beneath the driver’s seat
Connect the red (+) wire on the brake light to this wire. Connect to clear (-) wire to vehicle ground anywhere on the frame or body of the truck