What does the daytime running light module of a 1997 dodge ram 2500 look like?

There isn't a separate "daytime running light module" in a 1997 Dodge Ram 2500 like you might find in later vehicles with more sophisticated electronic controls. Daytime running lights (DRLs) on that model year were likely implemented in one of these simpler ways:

* Resistor Network in the Headlight Circuit: The most common method for 1997 models would be a resistor network integrated into the headlight wiring harness. This network reduces the voltage to the headlights, making them dimmer for DRL operation. You wouldn't see a separate box or module; it's just part of the wiring harness. Visually, you'd only see the wires and perhaps some slightly larger diameter wiring where the resistor is embedded.

* Modified Headlight Switch: The headlight switch itself might have a different internal mechanism to achieve DRL functionality. Again, no separate module, just a modified part of the existing system.

In short, you won't find a distinct, identifiable "daytime running light module." Any modification to achieve DRLs is integrated into the existing headlight circuit. If you're troubleshooting, you'll need to examine the headlight wiring harness and switch for any signs of modification or damage.