Heater, Fuel: Description

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The Fuel Heater 1 is located in the fuel filter/water separator housing assembly and is located on the engine.
The Fuel Heater 2 is located in the fuel filter/water separator housing assembly and is located on the frame rail.
The Fuel Heater is not a serviceable item. If diagnosis has lead you to replace the fuel heater then the whole fuel filter/water separator housing must be replaced.