Ram 2500 exterior bulb chart

The manual's Replacement Bulbs, Names, And Part Numbers tables list these exterior lamps. Its note says to see an authorized dealer for LED replacement.

Interior bulbs listed are the overhead console lamps (TS 212-9) and the dome lamp (7679). For lighted switches, the manual says to see an authorized dealer for replacement instructions.

From the 2026 Ram 2500/3500 owner's manual (Replacement Bulbs, Names, And Part Numbers), read November 8, 2026.

How to replace a rear tail, stop, turn signal or backup bulb

The manual's steps for the rear tail/stop, turn signal and backup lamps are:

1. Remove the two screws and pushpin retainers that pass through the bed sheet metal.
2. Pull the outboard side of the lamp rearward far enough to unsnap the two receptacles on the outboard side of the lamp housing from the two plastic snap post retainers in the outer box side panel.
3. Disconnect the wiring harness connectors from the bulb socket.
4. Rotate the bulb socket counterclockwise a quarter turn to unlock it from the housing.
5. Pull the bulb straight out of the socket.
6. Reverse the procedure to install the bulb and housing.

From the 2026 Ram 2500/3500 owner's manual (Replacing Exterior Bulbs: Rear Tail/Stop, Turn Signal And Backup Lamps), read November 8, 2026. The manual cautions not to touch the bulb glass with your fingers or let it contact other oily surfaces, or shortened bulb life will result.

Center high mounted stop lamp and other lamps

For the center high mounted stop lamp (CHMSL) with cargo lamp, the manual's steps are: remove the two screws holding the housing/lens to the body, rotate the bulb socket a quarter turn and pull it from the lamp assembly, then pull the bulb straight from its socket and replace it. The outside bulbs in that assembly are the cargo lamps and the inside bulb is the CHMSL.

The fog lamps (if equipped) are LED; in the event of a light malfunction, the manual says to see an authorized dealer. The cab roof marker lamps, rear lamp bar ID marker lamp, dual rear wheel side marker lamps and rear license plate lamp are also LED in the chart.

From the 2026 Ram 2500/3500 owner's manual (Center High Mounted Stop Lamp (CHMSL) With Cargo Lamp; Fog Lamps; Replacement Bulbs chart), read November 8, 2026.

How the Ram 2500 headlight switch works

The headlight switch is on the left side of the instrument panel. To turn on the headlights, rotate it clockwise; the parking lights, taillights, license plate light and instrument panel lights also come on. Rotate it back to O (off) to turn the headlights off.

Automatic headlights (if equipped) turn the headlights on or off according to ambient light levels; rotate the switch to AUTO. The engine must be running before the headlights come on in automatic mode, and with the system on, the headlights stay on for up to 90 seconds after the ignition is placed in OFF.

In automatic mode with the engine running, the headlights also turn on when the wiper system is on (a Uconnect-programmable feature). To turn on the front fog lights (if equipped), turn on the parking lights or low beams and push the fog light switch within the headlight switch; push it again to turn them off. The Daytime Running Lights come on whenever the engine is running and the low beams are not on.

From the 2026 Ram 2500/3500 owner's manual (Headlight Switch; Automatic Headlights; Automatic Headlights With Wipers; Front Fog Lights; Daytime Running Lights), read November 8, 2026.

High beams, automatic high beams and turn signals

Push the multifunction lever (left side of the steering column) toward the instrument panel to switch to high beams; pulling it back turns the low beams on. Lightly pulling the lever toward you flashes the high beams until you release it.

Automatic High Beam Headlamp Control (if equipped) uses a camera on the inside rearview mirror or a windshield-mounted camera to switch from high beams to low beams until an approaching vehicle is out of view. Turn it on by selecting ON under Auto Dim High Beams in Uconnect Settings and turning the headlight switch to AUTO, with the multifunction lever in the High Beam ON position. It will not activate until the vehicle is at or above 35 mph (56 km/h). Dirt, film and other obstructions on the windshield or camera lens will cause it to function improperly.

If a turn signal light stays on and does not flash, or flashes very fast, the manual says to check for a defective outside light bulb. Because the front turn signals are LED, have them checked by a dealer service department.

From the 2026 Ram 2500/3500 owner's manual (High/Low Beam Switch; Automatic High Beam Headlamp Control; Flash-To-Pass; Turn Signals), read November 8, 2026.

Ram 2500 service at Elgin CDJR

If a headlight or other lamp on your Ram 2500 is out, our Ram service center can check it. Our service department is open Monday to Friday 7 a.m. to 7 p.m. and Saturday 7:30 a.m. to 4 p.m., and is closed Sunday. Elgin CDJR is at 1500 W. Lake St. in Streamwood. Get directions.