2001 7.3L wiring harness diagrams - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 01-17-2006, 02:15 AM   #1 (permalink)
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2001 7.3L wiring harness diagrams

A squirrel got after my wire harness on top of my motor.
There are a couple wires he chewed off that I don't know
where they go. Does anyone know of any online wiring
diagrams or where else to find them. The wires I can't
figure out where they go are two go to the fuel filter heater
and along with that are two......red w/gray stripe and
gray w/red stripe that I don't know where they go. The
other goes from the center of the harness and splits out
and goes toward the back of the motor....but I don't know
where......it's black w/white stripe and yellow w/red stripe.
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Old 01-17-2006, 02:52 AM   #2 (permalink)
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Re: 2001 7.3L wiring harness diagrams

Ouch, that little bugger did a number on your truck. [img]/ubbthreads/images/graemlins/frown.gif[/img]

I took a look at my 99 Wiring diagrams and may have some clues for you, but can't find them all.

red/gray and black/white go to the exhaust pressure regulator from the 42 pin connector on top of the driver's side valve cover.

Gray/red goes to the WIF sensor in the same plug as the fuel filter heater (which is red/lt green). Gray/red is also the common signal return from most of the engine control sensors including the Engine Oil Temp (EOT) sensor which is in the back of the HPOP reservoir just above and to the driver's side of the Fuel Heater/WIF plug. The other wire to the EOT sensor should be light green/red.

I couldn't find a yellow/red wire, but found a white/red one to the wastegate control solenoid (the one with red and green hoses on the turbo outlet wye.) Maybe it's just yellowed a bit. [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Alldata has wiring diagrams, but I don't have a link to them. Maybe one of the guys who has a 2001 Service CD and could send you a wiring diagram.

Hope that helps. Good Luck with it.
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Old 01-17-2006, 08:13 AM   #3 (permalink)
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Re: 2001 7.3L wiring harness diagrams

Here is a full wiring diagram for your truck

http://www.thedieselstop.com/faq/949...2002wiring.pdf
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Old 01-17-2006, 05:53 PM   #4 (permalink)
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Re: 2001 7.3L wiring harness diagrams

[ QUOTE ]
Here is a full wiring diagram for your truck

http://www.thedieselstop.com/faq/949...2002wiring.pdf

[/ QUOTE ]

CAUTION - I used this on my 01 and IT ISNT RIGHT. The whole central junction box design is very different, so you are taking signficant risk by assuming ANY of it is right for the 01.

I am looking for the 01 wiring diagrams also, and having NO LUCK!!
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Old 01-17-2006, 05:55 PM   #5 (permalink)
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Re: 2001 7.3L wiring harness diagrams

Thanks for the info.
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