The taillight can be changed by either swapping the bulb inside the taillight housing or by replacing the entire taillight assembly, depending on the issue and your preference.
In this guide we’ll explain both approaches for common 2016 Ram configurations (such as 1500, 2500, and 3500 models). The exact access method can vary by cab/bed and trim, so consult your owner's manual if you run into a model-specific difference.
Two main approaches to taillight repair
Before diving into the steps, it helps to know there are two typical paths: replacing individual bulbs and replacing the entire taillight unit. Choose the option based on whether the problem is a single burned-out bulb or more extensive damage to the lens, housing, or wiring.
Bulb replacement (first option)
This section covers replacing the bulbs inside the taillight assembly without replacing the whole unit. Most 2016 Ram taillights use bulbs for tail, brake, and turn functions, with access from the rear of the assembly.
Before starting, verify you have the correct bulb type for your exact trim and year. If you’re unsure, check the owner’s manual or read the markings on the old bulb. Common replacements include 3157/3156 varieties for tail and brake/turn functions.
- Park the vehicle on a level surface, turn off the engine, and apply the parking brake. If you’re near traffic, set hazards and keep bystanders clear.
- Open the tailgate and locate the taillight area. Look for an access panel or cover on the inside of the bed wall or a removable plug behind the taillight.
- Remove the access panel or cover to expose the bulb socket. Some models require reaching the socket from the wheel well or behind the taillight.
- Twist the bulb socket counterclockwise (about a quarter to a half turn) and pull it out of the housing.
- Pull the old bulb straight out of the socket and insert a new bulb of the same type. Avoid touching the glass with bare fingers; use gloves or a clean cloth.
- Reinsert the bulb socket into the housing and twist to lock. Reattach the access panel or cover, then test the light by turning on the headlights and using the brake/turn signals.
- Close the tailgate and verify the seal around the taillight is watertight to prevent moisture intrusion.
If the new bulb fails again soon or if you notice corrosion or a loose socket, inspect the wiring and consider replacing the entire taillight assembly.
Full taillight assembly replacement
When the entire taillight unit is damaged or the housing itself is compromised, replacing the assembly may be more reliable and can sometimes be more cost-effective than replacing multiple bulbs.
Before starting, ensure you’re using the correct replacement housing for your specific Ram model and cab configuration (e.g., 2016 Ram 1500 Quad Cab vs. Crew Cab). Improper fitment can affect sealing and alignment.
- Disconnect the negative battery cable to minimize the risk of short circuits while working near electrical components.
- Locate the mounting screws or fasteners that secure the taillight housing from inside the bed rail or wheel well area. Remove these fasteners.
- Gently pull the taillight assembly away from the vehicle to expose the wiring harness.
- Unplug the wiring connector by pressing the release tab and pulling the connector apart.
- If the new unit requires moving bulbs, transfer them from the old housing or install the new bulbs as directed by the kit.
- Position the new taillight assembly in place, reconnect the wiring harness, and secure with the mounting screws. Reconnect the battery and test all functions (running lights, brake lights, and turn signals) to confirm proper operation.
- Reinstall any removed trim pieces or interior panels and ensure the lens seal is intact to prevent water ingress.
Note: Some 2016 Ram taillight assemblies use weather-sealed connectors or gaskets. If your new unit includes a gasket, install it correctly or reuse the original gasket to maintain a proper seal.
Safety tips and troubleshooting
Always work with the vehicle off and the keys removed. If you’re unsure about the correct bulb type or encounter corrosion, consider consulting a professional. If taillights still don’t function after replacement, check fuses, wiring, and the body control module, which can affect exterior lighting on some models.
Summary
Changing a taillight on a 2016 Dodge Ram can be done by replacing the bulb(s) or by replacing the entire taillight assembly. Start with bulb replacement if only one function is out; opt for full housing replacement when the lens, housing, or wiring is damaged. Use the correct bulb type and ensure a tight, water-resistant seal during reassembly. When in doubt, seek professional assistance to ensure proper fit and function.