2024 Ram 1500 — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Notes

• The 2024 Ram 1500 is offered with multiple lighting packages. Tradesman/Big Horn commonly ship with halogen reflector headlamps and halogen fogs; Laramie, Limited, Longhorn, and TRX typically have full LED projector headlamps, LED DRL/turns, and LED taillamps. Those LED assemblies do not use replaceable bulbs.
• The above sizes reflect common halogen-equipped trucks. Always verify on your specific trim/VIN before ordering.

LED vs halogen upgrade considerations

• CANBUS/load monitoring: The Ram BCM watches bulb circuits. Swapping a halogen 9005/7443/194/921 to LED can trigger hyper‑flash, bulb‑out messages, or flicker. Use CANBUS‑ready LEDs with built‑in resistors or add external 6–8 ohm, 50W resistors on turn circuits. For headlamps, an anti‑flicker/decoder harness may be needed.
• Headlight housings matter: LED bulbs should not be installed in LED projector housings (no bulbs) or used to “retrofit” projectors/reflectors not designed for them without checking beam pattern and glare. If you have halogen reflectors and want better performance, consider complete OEM LED headlamp takeoffs with proper adapters and BCM programming, or quality projector retrofit kits.
• Space, cooling, and dust caps: Many LED headlight/fog upgrades are deeper than stock. Ensure the LED heat sink fits under the dust cap without pinching wiring, and confirm cooling clearance behind the housing.
• Polarity and socket types: 194/921/744x sockets are polarity‑sensitive for LED; flip the LED if it doesn’t light. T20 (7443) is dual‑filament equivalent; use dual‑intensity LEDs for combined stop/tail positions.

How to replace each bulb

• Low beam/high beam (halogen reflector): Turn the wheel inboard for access, remove the fender‑liner push pins near the lamp, or access from the engine bay (varies by trim). Twist the 9005 socket counter‑clockwise to remove. Avoid touching halogen glass.
• Fog light: From underneath or through the front wheel‑liner, twist the H11 counter‑clockwise. If LED fogs, the entire lamp is serviced as a unit.
• DRL (halogen): Same as the high beam 9005—the truck drives it at reduced voltage for DRL.
• Front turn/side marker: Access the back of the headlamp; twist out the 7444NA (turn) and 194 (marker). Check the gasket and reseat the dust cap.
• Tail/brake/turn (halogen tails): Open the tailgate, remove the two T25/T30 screws on the lamp edge, pull the lamp rearward to release clips. Rotate the 7443/7440 sockets out, swap the bulb(s), test, and reinstall. LED taillamps are serviced as an assembly.
• Reverse: With the tail lamp removed, twist out the 921 socket and replace.
• License plate: From the bumper/plate light lens, release the tab, drop the socket, and replace the 194.
• Rear side marker: Shares the tail lamp housing; service while the lamp is off the truck.
• Interior map/dome: Use a plastic trim tool to pop the lens; swap the 194 wedge. If equipped with factory LED interior package, the board/assembly is replaced rather than a bulb.
• Cargo/CHMSL: Most 2024 trucks use an LED combo unit. Remove interior trim, then the mounting screws from outside. Replace the assembly and test for leaks.

Pro tips

• Disable auto‑headlights before replacement. Test each function (low, high, DRL, turn, brake, tail, reverse) before reassembling.
• Apply dielectric grease sparingly on halogen sockets to limit corrosion.

Common lighting issues for this generation

• Hyper‑flash after LED swaps: If you install LED turn bulbs (front or rear) on halogen‑equipped trucks, add resistors or program the BCM via a qualified shop to the LED setting where supported.
• Moisture in headlamp/taillamp: Check the rear dust caps and bulb gaskets. A slightly rolled cap seal can fog the housing. Persistent moisture typically requires lamp replacement under warranty.
• Flicker on LED headlight retrofits: Many 9005 LED kits need anti‑flicker harnesses on Ram trucks due to PWM. Choose CANBUS‑compatible kits with dedicated drivers.
• Tail lamp out warnings: The truck monitors current; mixing LED and halogen side‑to‑side can confuse it. Keep both sides matched and use CANBUS LEDs.
• Swapping to OEM LED headlamps/taillamps: Requires the correct adapters and BCM coding; plug‑and‑play harnesses exist but you may still need a dealer or specialist to program out bulb‑out messages.

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