Sensor location for Fuel Filter on CM-870?

[JMBT]

Waterloo the only fuel filter sensor i know of on a Volvo is the WIF, water-in-fuel sensor and when it fails, (or if it detects water), it throws a very annoying dash icon on the volvo screen.

Like Chamber said: "on the Davco".

Or Raycor, many Volvos run a Raycor fuel water seperator. It is usually outboard at the front of the passenger side frame rail. The sensor is in the plastic bowl on the bottom. The Volvo factory wiring to it often gets brittle and breaks because they zip tie it so tight and don't really give enough wire to begin with. Other then that there is a diode in the Raycor WIF sensor that goes bad. They are color coordinated so make sure if he replaces it to get the same color sensor body as the one he takes out or the Volvo ECM will not recognize it. (mine is Blue on a 2012)