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Ironmike
Ironmike, Ford Technician
Category: Ford
Satisfied Customers: 3303
Experience:  30 years ASE Master tech L1 . Ford master
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2003 ford expedition: 5.4 used scan tool..4x4 module any ideas..fuses

Customer Question

2003 ford expedition 5.4 used scan tool for codes 4x4 not working scan indicates no cummincation with 4x4 module any ideas all fuses are good in location 15,115,11
Submitted: 2 years ago.
Category: Ford
Expert:  Ironmike replied 2 years ago.

greetings,

what scan tool did you use?

do you have a multi meter?

Customer: replied 2 years ago.

Snap-On Motis Yes Fluke

Customer: replied 2 years ago.
Relist: Answer came too late.
Customer: replied 2 years ago.
Relist: Answer came too late.
Expert:  Ironmike replied 2 years ago.

I see f2-115 , f2 -20, f2-11.(f2-15 for cluster and trac switch)

make sure the dlc works for other modules like PCM. we need to check for power at the 4x4 module. pins 17 DG/LG and 8 DB should have battery voltage

you can check the ground next pins 2 and 1 BK/LB and BK to 300 ,301 less than 5 ohms

next we should check the data line pin 3 dlc to pin 4 at the 4x4 module VT wire

less than 5 ohms.

I will look for bulletins

let me know what you find

Customer: replied 2 years ago.

Where is this module located and if i dont have power and ground at these location what is the problem where does the power come from

 

Expert:  Ironmike replied 2 years ago.

module is behind the b pillar(where the drivers seat belt strap anchor is)

in between drivers front and rear seats on b pillar.

power comes from Central junction box(CJB) 115 and 20

if you have power to the fuse and no power out at either wire at the 4x4 module we have an open.

Expert:  Ironmike replied 2 years ago.

if we have power, grounds are good and the data line is good we have a bad 4x4 module. We load test the circuits to make sure no excessive resistance. Make sure circuit is disconnected at component ends and run power through it,I use a headlight bulb for the load. If there is heavy resistance the bulb will not light or barely.

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