WIF light stays on...

[Bluebird]

I changed my fuel filter (regular service at 15k). When put it all back together the WIF light stayed on. I took it off to reclean it, and it continued to stay on, (I really don't believe there is water in because I had filled up that morning, no light on). I bought a new sensor, replaced the sensor only. The light stayed on again. I changed this filter numerous times before with no problems. Do you think the filter canister could be the problem? Got any ideas?

Thanks for you help in advance! Patrick

 

[Greenleaf]

Patrick,



Perform the wiggle test while that light is illuminated. Have someone watch for the lamp to go off while you are giggling the wires.



The way in which mine went out was to spray starting fluid into the end of the wire connector, blow it out with compressed air and then install some corrosion preventative compound. It aint ever been on since then.



I'm going to go and look in the manual to see if this connection is NO or NC It may give us some idea how it works.



-S

 

[Bluebird]

WIF light...

Oo. I did the giggle test when the light first went on... No change in the light staying on. That's why I bought a new sensor. I'll spray up the wires, what can I hurt? The plug from the sensor to the wire is connected, but the contacts are not touching. Will that affect any of the electronics, or ECM? I'll wait for your research. What does NO, NC mean anyway? I hope some others who may have had the same situation chime in. The truck runs fine, oh, except for a intermitten slight leak :{ at the front of the injection pump (did it once before a year ago, then dried up... ). I continue to drive the "Bird" daily :-laf

Patrick.

 

[cerberusiam]

Patrick, check the inside of the filter for a spring or clip retainer or something of that sort. They have been known to get slightly out of line and touch one of the probes hence a WIF light that won't go out. If you unplug the harness close to the sensor and the light goes out you have a completed circuit somewhere between the plug and sensor. If you replaced the sensor and used a spray cleaner and air to clean it the sensor could be bad or touching something.

 

[Greenleaf]

Partick,



Did you try unpluging the sensor while the lamp is lit?? I was looking to determine if this sensor is normally open or normally closed. I didn't find that. It did say in the book that the ECM controls the WIF lamp and uses the sensor as the signal.



If you unplug that sensor while the lamp is illuminated and the light goes out then the sensor is normally open, providing there isn't a short somewhere else. In other words the water would create a path to ground.



My buses use a WIF sensor. These use only one wire where as our filter sensor has the two. I'd have to believe that the water will create a path to ground where as the fuel won't (?????????????) I ain't no chemist and don't know how things in there are working exactly. I do know that water in diesel will float to the bottom and congregate there. When there is enough water droplets they must create a path for the electricity to follow from probe to probe.



I duuno



Scott

 

[JLEONARD]

float to the bottom

:-laf :-laf



Float... to rest on the surface.

Sink... to go to the bottom.

Sheeesh!!



Water is heavier than diesel fuel so it SINKS to the bottom... . the water makes continuity between the two probes and turns on the light when it acumulates to whatever the needed level is to make contact.



Try spraying WD40 or equivelent into the plug in an attempt to dry it out good. That has been suggested before and seems to work.

Jay

 

[Greenleaf]

In search of something really smart to say, but haven't thought of anything, yet.....



-S

 

[cerberusiam]

In search of something really smart to say, but haven't thought of anything, yet.....

LOL!! :-laf :-laf :-laf





You could tell him to go "float" his boat and "sink" his sinker.



Somebody oughta hide his dictuonary.

 

[JLEONARD]

I was floating on cloud nine... ... . but now I have this sinking feeling... ... .....

:-laf :-laf



In April PLEASE tell me to float my boat... I'll glady oblige



Youse guys are too funny...

Jay

 

[tugboatphil]

I don't know what could cause it, but could there be a problem behind the dash where the WIF light is?

 

[DBF]

I just went thru this crud. Must have got some fuel in the connector. I disconnected the sensor and sprayed the connector with WD-40. Then I let it hang there for a couple of days to make sure whatever was in it drained out or evaporated.



When I plugged it back together, the light stayed off.



OBTW, when you jumper between the two pins on the sensor, the light comes on.



DBF/Owen