Electrical Item ID

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Aug 29, 2010 | 04:57 PM

Festus Hagen

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From: Maine (NorCal Native)

Electrical Item ID

Hi all,

I remember reading a thread with a post that states what the below electrical item is, CRS sucks, I've searched and cannot find the answer ...

So what is it, Water in fuel ??? One of the wires goes to the filter area, never plugged in since before I owned the truck!

Thanks!

-Enjoy
fh : )_~

Aug 29, 2010 | 05:09 PM

oreocreaming

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From: Elk City, OK

the black block is a relay, the 2 wire plug goes to the block between the fuel filter and the ip, and the blown is of course for the #1 glow plug

Aug 29, 2010 | 05:14 PM

Festus Hagen

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From: Maine (NorCal Native)

Dang, I forgot to point the black box out, my mistake ... Ok it's a relay, for what???

-Enjoy
fh : )_~

Aug 29, 2010 | 07:09 PM

oreocreaming

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From: Elk City, OK

not sure lol. if nobody else can pin point that for you, i'll cut my old loom apart and trace it for ya. ive been wondering myself.

Aug 29, 2010 | 07:47 PM

Festus Hagen

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From: Maine (NorCal Native)

My loom is apart, the PO had all the wires off the filter stuffed down by the thermostat housing doing nothing ... It doesn't have the standard Ford 7.3 Filter on it.

To the relay, there are 4 wires, 3 of them go to the engine bay harness, 1 goes to the fuel filter, it looks like it would only reach to the bottom of the filter, it has a 90 degree female stud connector just like the oil sending unit.

Wire colors ...
<table><tr><td>1</td><td></td><td align="right">16Ga. Red/Yellow</td><td></td><td>-</td><td></td><td align="left">Water in Fuel ???? (little black cube) pin1 - From Relay to Engine Bay</td></tr><tr><td>2</td><td></td><td align="right">16Ga. Red</td><td></td><td>-</td><td></td><td align="left">Water in Fuel ???? (little black cube) pin2 - From Relay to Engine Bay</td></tr><tr><td>3</td><td></td><td align="right">16Ga. Black/LtBlue</td><td></td><td>-</td><td></td><td align="left">Water in Fuel ???? (little black cube) pin3 - From Relay to Engine Bay</td></tr><tr><td>4</td><td></td><td align="right">16Ga. Black</td><td></td><td>-</td><td></td><td align="left">Water in Fuel ???? (little black cube) pin4 - From Relay to Fuel Filter???</td></tr></table>
The Water in fuel sensor is in the bottom of the 7.3 filter correct, so that's what it has to be for, though I'm only assuming!

-Enjoy
fh : )_~

Aug 30, 2010 | 01:20 AM

LCAM-01XA

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This is the relay for the fast idle and cold advance IIRC. Dunno why you have a wire from it to the fuel filter, that wire should go from the filter to the WTS module in the dash... I'll see if I can sort mine out tomorrow in the daylight.

Aug 30, 2010 | 03:32 AM

Festus Hagen

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From: Maine (NorCal Native)

I think I figured it out ...
<table><tr><td>1</td><td></td><td align="right">16Ga. Red/Yellow</td><td></td><td>-</td><td></td><td align="left">Water in Fuel Relay - Switched 12v+ keyon/keystart</td></tr><tr><td>2</td><td></td><td align="right">16Ga. Red</td><td></td><td>-</td><td></td><td align="left">Water in Fuel Relay - Relay switched 12v+ to power Water In Fuel indicator</td></tr><tr><td>3</td><td></td><td align="right">16Ga. Black/LtBlue</td><td></td><td>-</td><td></td><td align="left">Water in Fuel Relay - Grounded with keystart for Bulb test</td></tr><tr><td>4</td><td></td><td align="right">16Ga. Black</td><td></td><td>-</td><td></td><td align="left">Water in Fuel Relay - Trigger, WIF sensor grounds this energizing the relay</td></tr></table>
At least thats what I've come up with without a schematic ...

Thanks

-Enjoy
fh : )_~

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Aug 30, 2010 | 10:48 AM

oreocreaming

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From: Elk City, OK

the water in fuel plug is black with a black 90 degree elbow on it that slips over a threaded stud.

Aug 30, 2010 | 03:16 PM

#10

NorthernDiesel

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From: Timmins, Ontario, Canada

Ok the EVTM manual says the following: (colors are for 1994)
The relay is part of the "Warning Indicators" circuit and for the WIF indicator

Red/Yellow - From Fuse 17 to the Relay - 12V in Start or Run
Red/Black - From Fuel/Water Sediment Bowl to the Relay - Grounded when water present
Black/Light Blue - From Ignition Switch to Relay - Grounded in "Start" and open otherwise
Red - From Relay to Water-In Fuel Indicator

If either the key is in start or theres water in the filter bowl, one side of the relay circuit is grounded, connecting 12V to the WIF light on the other side of the relay.

Festus you got it right on.

Last edited by NorthernDiesel; Aug 30, 2010 at 03:17 PM. Reason: Checked colors