2017 Ram 3500 Bulb Sizes & Replacement Guide

Quick Reference

The 2017 Ram 3500 offers a robust and dependable platform for work and recreation, and its lighting system is designed to provide excellent visibility. Depending on your specific trim level and optional packages, your Ram 3500 may come equipped with either traditional halogen bulbs or more advanced High-Intensity Discharge (HID) headlights, and in some cases, OEM LED daytime running lights. It's crucial to verify the existing bulbs on your truck before purchasing replacements, as variations exist.

For the low beam headlights, most 2017 Ram 3500 models utilize an H11 halogen bulb. However, higher trim levels or those with optional lighting packages may feature projector-style headlights with D3S HID bulbs. The high beam headlights consistently use a 9005 halogen bulb across all trims. Fog lights are commonly H10 or 9145 halogen bulbs. Daytime Running Lights (DRLs) can vary; many trucks use a 4114 halogen bulb, while others integrate OEM LED strips as their DRLs. Front and rear turn signals, as well as brake and tail lights, typically employ 3157 halogen bulbs. The reverse lights are commonly 921 halogens, and license plate and side marker lights usually take 194 bulbs. Interior lighting, such as the dome and map lights, will generally be 578 and 194 bulbs, respectively.

LED vs Halogen Upgrade Considerations

Upgrading from halogen to LED bulbs can significantly improve visibility and give your 2017 Ram 3500 a more modern look. However, there are several factors to consider before making the switch.

CANBUS Errors: Modern vehicles like the Ram 3500 use a Controller Area Network (CANBUS) system to monitor various electrical components, including lighting. When you replace a halogen bulb with an LED, the lower power draw of the LED can trick the CANBUS system into thinking the bulb is out, triggering a "bulb out" warning on your dashboard. To prevent these errors, you will likely need CANBUS-compatible LED bulbs or separate load resistors (decoders) wired into the circuit. Without these, you might experience hyper-flashing turn signals or constant error messages.

Adapters Needed: While many LED bulbs are designed for direct plug-and-play installation, some applications may require specific adapters or spacers to ensure proper fitment and beam pattern, especially in projector housings. For HID replacements, an entire conversion kit is necessary, which includes ballasts and igniters in addition to the D3S LED bulbs, if you are converting from OEM HID to LED.

Beam Pattern: The reflector or projector housing of your Ram 3500 is designed for the specific light output pattern of a halogen or HID bulb. Installing an LED bulb with a different light source geometry can result in a scattered, unfocused beam pattern that reduces effective light output and can blind oncoming drivers. Choose high-quality LED bulbs specifically designed to mimic the filament placement of the original halogen or HID bulb for optimal performance.

How to Replace Each Bulb

Low Beam/High Beam Headlights: Access to the headlight bulbs typically involves opening the hood and reaching behind the headlight assembly. You may need to remove a plastic cover or twist a retaining ring to release the bulb. Ensure the engine is off and the lights are cool before handling.

Fog Lights: These are usually accessible from underneath the front bumper or by removing the wheel well liner. It