Why does my fuel filter have power?

[karrlot]

I have a DT466. I was removing unneeded wires from inside. I found a wire that was plugged into the front of the fuse box. The wire came out and split. One wire was just a loose wire under the dash. I traced the other wire which went through the dash to the engine compartment. It was connected to the bottom of the water separater/fuel filter.

The engine runs without it being connected. Why does a fuel filter need power? Is there a pump in there?

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[Timelord]

Heater, most likely. If not a heater, a water in fuel sensor. One or the other.

[Brad_SwiftFur]

It's probably a "Water in Fuel" indicator.

[karrlot]

How can I find out if it's a heater or sensor?

[cadillackid]

I love the RACOR's.. we had the same one on our scouts many years ago... the wires were for a water in fuel sensor.. I dont remember there being a heater in it though RACOR DID make some with it... if it is a heater the terminals on the heater will have some type of resistance value when the hasrness is unplugged... you can measure across it with a meter..

im guessing if its a water in fuel light it would be just a switch and show open?

-Christopher

[cadillackid]

I just looked it up... its a water separator indicator light add-on kit...

http://www.dublerfamily.com/Regina_o...s%20Manual.PDF

-Christopher

[karrlot]

Thanks!
The way it is now it only has one wire coming from the fusebox to the filter, and a ground going to the chassis. There was nothing else going to the dash for a warning light.


So this is something that is optional and I don't need to worry about hooking it up and making sure it works, right?