TAIL LIGHT HARNESS 2025+ RAM

The tail light harness on 2025+ RAM vehicles is the electrical connection between the vehicle’s chassis/body wiring and the rear tail lamp assembly. It routes power and control signals to the rear lighting functions, including parking/running lights, brake lights, turn signals, and reverse lights, while providing the necessary ground and connector interfaces. The 2025 RAM 1500 uses dedicated tail-lamp/jumper wiring components, including harnesses described by Mopar as connecting the chassis harness to the tail lamp

Primary Functions

• Supplies electrical power to the left and right tail lamps.
• Carries signals for park/running, brake, turn, and backup lighting.
• Provides the ground connection between the lamp and vehicle electrical system.
• Connects the main chassis/body harness to the tail lamp through OEM-style connectors.
• Maintains proper electrical communication with the vehicle's lighting control system, where applicable.
• Allows the tail lamp assembly to be disconnected for service or replacement; the 2025 RAM service procedure specifically identifies wiring-harness connectors at the rear lamp.