Dorman 645-103 Side Marker Light Socket - Front or Rear

Dorman 645-103 Side Marker Light Socket

Dorman 645-103 is a side marker light socket assembly for front and rear lighting repairs on select Ford, Lincoln, Jeep, and Mercury vehicles. It uses a rectangular connector layout with blade terminals and female connector ends for a direct electrical connection in the affected lamp circuit.

Key Features

• Side marker light socket assembly for electrical lighting repair
• Rectangular bulb base type and rectangular connector shape
• Blade terminal type with 2 terminals
• Female connector and female terminal design
• Black and brown connector colors for harness identification
• Extra-long leads and multiple butt connectors per Dorman socket assembly design
• Compatible with front park and turn signal applications on select Jeep Compass and Ford Mustang models

Fitment and Application

• Fits 2014-2021 Jeep Compass, front park and turn signal.
• Fits 2017-2018 Ford F-250 Super Duty, front.
• Fits 2017-2018 Ford F-350 Super Duty, front.
• Fits 2015-2018 Lincoln MKC, front.
• Fits 2016-2018 Lincoln MKX, front, without automatic headlight leveling system.
• Fits 2015-2017 Ford Expedition, front.
• Fits 2015-2017 Ford F-150, front.
• Fits 2015-2017 Ford Mustang, front park and turn signal.
• Fits 2015-2017 Ford Mustang, front.
• Fits 2011-2013 Jeep Grand Cherokee, front park and turn signal.
• Fits 2010-2012 Ford Fusion, rear.
• Fits 2010-2012 Lincoln MKZ, rear.
• Fits 2010-2011 Mercury Milan, rear.

Detailed Description

This Dorman side marker light socket is built for vehicles that need a replacement electrical socket at the lamp housing. It is a practical repair part for restoring a secure bulb connection in front marker, park, turn signal, and rear lighting locations on applications such as the Ford F-150, Ford Mustang, Jeep Compass, and Lincoln MKZ. Part number 645-103 cross-references Ford 9E5Z13411B and Mopar 68091384AB for the same application.

The socket assembly features a rectangular connector profile, female connector ends, female terminals, and blade-style terminals to match the original electrical interface on supported vehicles. Dorman’s socket assembly design includes extra-long leads and multiple butt connectors to simplify wiring repair where the original socket has failed or the connector has been damaged.

Common Repair Uses

• Broken or heat-damaged side marker light socket
• Intermittent park or turn signal lamp connection
• Corroded electrical terminals at the lamp housing
• Damaged connector on front or rear lighting circuits
• Restoring lighting function after socket wear or wiring failure

Installation Notes and Quality Assurance

Verify connector shape, terminal style, and vehicle-specific fitment before installation. Match the socket to the correct front or rear lamp location and confirm whether the application is equipped with automatic headlight leveling system exclusions where listed. Dorman 645-103 is engineered as a replacement socket assembly for the listed applications and is backed by Dorman’s product engineering standards.