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01 b3000 4wd won’t work

DoulbleD

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Ashford WV
Vehicle Year
2001
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Mazda b3000
Transmission
Automatic
4wd stopped working so bought a new TC motor and still not working. Checked all fuses. Anyone have a clue, thx
 


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rusty ol ranger

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177 CID
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2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
Could be an issue with the vacuum hubs. Anyone know about those?
 

Colin

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2WD / 4WD
2WD
Thought 01 switched to the live axle setup.
OP you need to do some better diag besides throwing parts at it.
What happens when you try to engage 4*4?
 

RonD

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2001 to 2006 Ranger 4x4s(or similar year B-series) used the early version of the 4x4CM, control module, in 2001 to 2003 its behind the passenger side kick panel, says "4x4CM" on the label, 2004 and up its behind the Radio
These were known to fail over time

If you checked the 4 fuses and they are OK
Fuse 13 in ENGINE BAY fuse box
Fuses 5, 10 and 11 in Cab fuse box

Then turn on the key, 4WD lights should come on and then go off, that's a Bulb Test, nothing more

Change the 4WD knob to a new position
If the 4WD lights flash then 4x4CM is working and the shift motor on the transfer case is not moving, bad fuse 13 or bad shift motor

If no 4WD lights come on then its most likely the 4x4CM, it runs the dash lights

These are not cheap new, but wrecking yard replacements can be bad as well
Take the Ranger to wrecking yard with passenger kick panel removed, and swap in 2001-2005 replacement 4x4CM until it works
No HOT swaps, turn OFF the key before swapping modules, then turn key back on to test
2006 may work, but 2007-2011 will not work for sure

Just FYI
Its NEVER the dash 4WD switch, unless its been hit with a hammer and physically broken it just works, just has 3 resistors inside and 2 wires, very simple switch
 
Last edited:

DoulbleD

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Ashford WV
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Mazda b3000
Transmission
Automatic
TY, RonD for ur help and ur detailed instructions as far as troubleshooting this problem. It was the control module after all. I’m new on this site and I’m glad I found it as I’ve already learned a lot more about my 01 Mazda b3000 than I ever have by reading my Haynes manual. Again, thx for ur help my friend
 

RonD

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Thank you for the follow up post, and THE FIX
It will help someone else down the road
 

DoulbleD

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Location
Ashford WV
Vehicle Year
2001
Make / Model
Mazda b3000
Transmission
Automatic
Ur welcome, and I hope it does help someone as it has myself. Looks like I’m gonna b no stranger here as I have a few more issues to address with this vehicle. A few I’m sure to have questions about, and I know now where to find the answers to them
 

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