One problem related to exterior lighting has been reported for the 2003 Dodge Ram 3500. The most recently reported issues are listed below.
Trailer lighting for 2001-2005 Dodge ram light duty (1500-5500) trucks with integrated heavy duty towing package relays can fail if accidental connection to mis-wired trailer, but are not repairable and parts are not available to replace the integrated power module (ipm). The relays for such are inside a sealed portion of the ipm, and cannot be replaced. There are no fuses or serviceable parts to protect against this failure. This failure results in non- or incorrectly-working trailer lighting which can result in motor vehicle accidents and injury or death.
| Headlights problems | |
| Exterior Lighting problems | |
| Hazard Flashing Warning Light problems | |
| Brake Light problems | |
| Turn Signal problems |