electrical

Headlight Bulb - Single

for 1994–2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD

Difficulty

Easy

Time

18 min

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

Replace a single headlight bulb on a 1994-2007 Dodge Ram 2500 with 5.9L Cummins diesel engine. This procedure involves accessing the bulb from behind the headlight assembly.

Warnings

⚠Never touch the glass envelope of a halogen bulb with bare hands. Oil from skin causes hot spots that lead to premature failure.

⚠Allow headlights to cool for at least 10 minutes if recently used to prevent burns.

ℹ️Verify correct bulb type before beginning work. 1994-2001 models typically use 9004, 2002-2007 use 9007.

Tools required

Flathead screwdriver

Socket wrench set

Nitrile glovesEssential

Clean cloth or paper towelEssential

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Parts

Headlight bulb (H4 or 9007 type) × 1 — Use OEM specification - verify bulb type on existing bulb

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level surface and turn off engine
Allow headlights to cool if recently used
Open hood and secure with prop rod
Identify which headlight bulb needs replacement (driver or passenger side)
Put on nitrile gloves to prevent skin oils from contaminating new bulb

Procedure

1
Access bulb from engine compartment
Locate the back of the headlight assembly from inside the engine bay. The bulb socket is accessed from behind the headlight housing. Access to the rear of the headlight housing may be tight on the passenger side due to the Cummins air intake plumbing; move any obstructing components as needed for access. Confirm the specific clearance for this vehicle.
2
Disconnect electrical connector
Grasp the electrical connector at the base of the bulb socket. Press the release tab (typically on top or side of connector) and pull straight back to disconnect. Do not pull on the wires themselves.
3
Remove bulb retaining ring
Locate the metal or plastic retaining ring that secures the bulb in the housing. Rotate the ring counterclockwise approximately 1/4 turn until it releases, then pull it away from the housing. Some models use a wire bail-type retainer that unclips by pressing the spring end and rotating away.
4
Remove failed bulb
Carefully pull the old bulb straight out of the headlight housing socket. Note the orientation of the alignment tabs on the bulb base to ensure correct installation of the new bulb. Inspect the socket for corrosion, melting, or damage.
5
Prepare new bulb
Remove the new bulb from its package without touching the glass. If you accidentally touch the glass, clean it thoroughly with rubbing alcohol on a clean cloth and allow to dry completely. Verify the bulb type matches the original.
6
Install new bulb
Align the tabs on the new bulb base with the slots in the headlight socket. Insert the bulb straight into the socket until it seats fully against the housing. The bulb should fit snugly with minimal wiggle.
7
Reinstall retaining ring
Position the retaining ring over the bulb base and align it with the housing. Rotate clockwise approximately 1/4 turn until it locks into place. For wire bail-type retainers, hook the spring end back into its slot and rotate into locked position. Ensure the bulb is held securely.
8
Reconnect electrical connector
Push the electrical connector firmly onto the bulb terminals until you hear or feel it click into place. Gently tug on the connector to verify it is fully seated and locked.