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sprinkles08
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 22368
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
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2001 dakota 4wd service light and will not engage 4 wheel drive

Resolved Question:

2001 dakota 4wd service light and will not engageXXXXX
Submitted: 7 years ago.
Category: Dodge
Expert:  sprinkles08 replied 7 years ago.

Hello and welcome to JustAnswer!

 

The first thing you'll want to do is make sure it's in park and the transfer case is engaged in a gear (not neutral) and slide underneath. Find the wiring coming out of the transfer case shift motor on the left side. Make sure it hasn't gotten down into the driveshaft and rubbed through. Sometimes the harness will fall down and rub on the driveshaft until a wire shorts to ground.

 

If that looks ok then the next thing that would need to be done is have the codes read from the transfer case control module. Since the service four wheel drive light is on and it won't shift there will be stored fault codes to point in the right direction for diagnosis. Your problem could be the switch, module, wiring, internal transfer case, or the shift motor itself. The shift motor would be most common.

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Customer: replied 7 years ago.
how is the code read. I have a OBDII but no codes came up
Expert:  sprinkles08 replied 7 years ago.
You'll need a full capability scan tool that can access the transfer case control module. A dealer scan tool or high-end aftermarket scan tool. A basic OBDII code reader will only access some engine and trans codes but won't be able to talk to the other handful of modules on the truck.
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