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4x4 Problems on 2002 Explorer


James Horton

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Joined
February 16, 2020
Messages
4
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City, State
Dandridge
Year, Model & Trim Level
2002 Ford Explorer
I am having problems with the 4x4 on my 2002 Ford Explorer. The 4x4 switch lights come on, but when I press one of the buttons (4x4 Low, 4x4 High, and 4x4 Auto), nothing happens. I did some troubleshooting and checked to make sure all of the 4x4 related fuses are not blown and that I was getting power to the switch. I even replaced the 4x4 transfer control module underneath the front passenger side compartment. No luck so far. Solutions?
 


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drdoom

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December 13, 2007
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City, State
VA
Year, Model & Trim Level
2005 Eddie Bauer 4.6L 4X4
You can't just press 4LOW, you have to be in neutral with foot on the brake.
 




James Horton

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Year, Model & Trim Level
2002 Ford Explorer
Ok, I will try that. Is that the same thing for 4x4 AUTO and HIGH?
 




fordysenior

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October 10, 2014
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City, State
True Northern California
Year, Model & Trim Level
2002 Expl 4x4 XLT 4.6L
You can shift in and out of 4x4 AUTO and 4x4 HIGH as you drive down the road. There is no noise to tell you it happens, but the dash light for 4x4 HIGH shows up. To shift into 4x4 LOW, you have to be stopped, foot on the brake. And I've never heard any noise to tell me it's shifted, but when I give it the gas, it is noticeable.
 




James Horton

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City, State
Dandridge
Year, Model & Trim Level
2002 Ford Explorer
Ok, so I tried the advice you gave me about putting it in Neutral with foot on the brake and changing to 4x4 Low. The indicator light on the dash does not light up. I am not sure if it worked or not, but I tested it going up a hill and stopped on the incline and then changed to 4x4. I accelerated up the hill and did not get wheel slippage that I get with 2WD vehicles.
 




James Horton

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City, State
Dandridge
Year, Model & Trim Level
2002 Ford Explorer
The 4x4 still does not work, though. I dug through some of the wiring and found a 5 pin connector not plugged into anything at all. I looked behind the radio compartment and found a wire strand with 5 different wires on it (red, green, blue, yellow, and black). I found that two of the wires have fuses build in on the ends. Does anyone happen to know where these go?
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MrPulldown

Active Member
Joined
March 1, 2017
Messages
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City, State
Truckeee
Year, Model & Trim Level
2004, 4wd, 4.6l
You can shift in and out of 4x4 AUTO and 4x4 HIGH as you drive down the road. There is no noise to tell you it happens, but the dash light for 4x4 HIGH shows up. To shift into 4x4 LOW, you have to be stopped, foot on the brake. And I've never heard any noise to tell me it's shifted, but when I give it the gas, it is noticeable.
Mine will make a thunk sound when shifting in and out of 4 low.
 




TechGuru

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Joined
August 23, 2015
Messages
2,005
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Location
Texas
Year, Model & Trim Level
2003 XLS 4X4 4.0L FLEX
The 4x4 still does not work, though. I dug through some of the wiring and found a 5 pin connector not plugged into anything at all. I looked behind the radio compartment and found a wire strand with 5 different wires on it (red, green, blue, yellow, and black). I found that two of the wires have fuses build in on the ends. Does anyone happen to know where these go?View attachment 178522 View attachment 178523 View attachment 178524
The 5 pin is the trailer brake controller connector.

You use this adapter wire to connect it to a trailer brake controller.

Trailer Brake Controller Harness
 




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