Sensor, Water In 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.
For 2013 model year there are two Water-In-Fuel (WIF) sensor being used. WIF sensor No. 1 is located on the fuel filter/water separator housing on engine, and WIF sensor No. 2 is located on the frame rail near the fuel tank.
WIF sensor No. 1 (3) is located on the bottom of the fuel filter/water separator housing (1).
WIF sensor No. 2 (3) is located on the bottom of the fuel filter (1).