Question about 2006 Ford Expedition

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Just changed the battery in a 2006 Expedition. Now, the radio will not turn on and the 4x4 Hi and Low blinks upon start up. What needs to happen to fix these two problems?

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  • zantello7 Dec 13, 2009

    Basically, my wife's battery died. It was replace on the spot. Now, the radio will not turn on at all. Push the on/off button. Nothing. Plus, upon starting the vehicle, 4X4 High and Low flash. I think 3 or 4 flashes. I tried to engage 4 Hi, the indicator light for 4 Hi does not come on. In a nutshell, that is it. I realize the computer needs to relearn the shifting and such after the memory was erased but what of the radio? Not sure how to fix either.

  • Vincent_G
    Vincent_G May 11, 2010

    Check for detached fuse-able links (addition power cables) Look for bad of detached ground cable. ======== Remove and clean both battery terminal posts. Take a read of the voltage before startup and 3 minutes after start up. Before should be 12.6V or higher Post startup should be 13.8V to 14.2V Post the reading on the comment window..



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Posted on Jan 02, 2017

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SOURCE: 97 expedition is stuckin low range 4x4

Did you try putting it in neutral for 15 seconds then switching it back to 2 wheel?

Posted on Dec 15, 2008


SOURCE: 4x4 not shifting into high

hi how are you doing? just had same problem with by gmc i replaced the transfurcase motor and it works fine. the electric motor moves the shifter in your transfurcase from 4hi to 4lo and 2hi.there is only 3 things that operate your 4x4 the switch the motor and the control modgual.

Posted on Jan 28, 2009

  • 984 Answers

SOURCE: Dash selector does not engage

Operationally vacuum holds the IWE ( Integrated Wheel Ends ) out, and once vac is removed the spring engages the IWE.

Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.

- If the front drive shaft does not turn :
Shut of the truck ( still jacked up, and supported ) remove the vac lines from the IWE. The spring should push the gears in, without the vac line on.
Check the vent line ( tube that is routed into the engine compartment with nothing attached to it ), for blockages.
If the vent line is clear, and with the vac lines off the IWE should be engaged ( both front wheels locked ).
If they lock, the problem is with the IWE solenoid not shutting off vacuum to the IWEs. There is a TSB on the 2004-2006 IWE solenoids, a newer revision has been made, and used from 2007 and newer MYs.

Here is a block diagram of the IWE system

If the front drive shaft turns, it is either the connector to the transfer case or the transfer shift motor not functioning correctly.
Check the connector for corrosion on both the male and female pins.
Turn key to run ( do not start ) and have someone turn from 2WD to 4H and back again while hitting the transfer case with a dead blow hammer ( not a steel hammer ) to see if the shift motor is hanging up.

Not sure if selector does not engage 4x4 hi or 4x4 low means the lights on the mode selector switch do not change, or if the switch selects 4H, but the front wheels do not function, so hard to provide a true direction on where the problem could be.

Posted on Dec 13, 2010

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This is very strange because of How the low range is engaged. I drive a 1999 F150 4x4 which has the same dash and controls for the 4x4 as your Expedition. I do know that the fan control switch is unfortunately the same shape and very close to the 4x4 switch. It is easy to grab the wrong knob and turn the wrong thing than was intended.

My initial impression is if it is possible, your girl could have reached over to move the fan switch and actual grabbed the 4x4 switch instead. Or you were warming up the Expedition and meant to turn up the fan and instead turned the 4x4 switch to Low. Or a backpack she was moving with schoolbooks could have hit the switch. What puzzles me is that to go into Low range, you need a foot on the Brake and simultaneously need the gearshift in Neutral and the 4x4 selector in Low. That is 3 things to make the low range happen.

Even if your foot was on the Brake and the sensors caught the gearshift going through Neutral on its travel to Park, the 4x4 Selector would have to be in Low. There is one problem you can have with the 4x4 Selector.***The Selector has 3 Resistors and a LED bulb.***

You stated the Selector switch was good. This would mean there were 3 different Voltages under the vehicle. Sometimes when the LED bulb burns out, it shifts the Voltage out of range for the Servo, and although the Selector says one thing, the Voltage at the Servo has the wrong value for that function. Since the dash light and the Servo agree on Low, it would seem the Selector is out of sync with the other 2 parts.

I hope my solution is very helpful in solving your problem.

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