For the 2012 RAM 1500, the low-beam headlights use H11 bulbs, while the high-beam headlights use 9005 bulbs. Confirm the existing bulb and housing before ordering, especially if the truck has replacement headlamp assemblies.
Several exterior lighting positions vary by headlight configuration. Trucks with 2 headlights use 3157 bulbs for the front turn signals and parking lights. Trucks with 4 headlights use 3157A bulbs for those same positions. The front side markers use 3157A bulbs.
- Rear turn signal: 3157
- Brake and tail light: 3157R
- Reverse light and center stop light: 921
- License plate light: 194 or 7441
Interior fitments include a 578 dome light, 212-2 map light, 921 trunk light, and 37 ash light. Match the replacement bulb to the correct location and verify whether the truck has the 2- or 4-headlight configuration before purchasing front signal or parking-light bulbs.