4x4 will not engage
#1
4x4 will not engage
I have an 01 super cab 4x4 with an 05 4.0 motor and trans. 4x4 will not engage at all. I've replaced the switch, the tcase shift control module, and the shift motor. I Even replaced the indicator bulbs in the cluster. Still nothing. It was working before trans was rebuilt. I don't know what the hell to do.
Last edited by 1badwelder; 11-22-2015 at 01:14 PM.
#2
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I assume it works in 2WD?
So what is happening is that the shift motor is not turning so transfer case stays in 2WD.
When you change selector to 4WD high what do the lights do?
Flashing then steady light usually means shift motor moved to correct position, just flashing means it did not move.
No lights = no power
The shift motor itself has the position contacts inside, so when motor turns these contacts are moved into a position where 2 line up and pass power back to 4WD system module to confirm correct position and light goes steady.
You can usually hear the motor turn.
Have you looked at the fuses.
In engine fuse box #13 20amp
In cab fuse box #5, #9, #10, #11 and #28, all play a part in 4x4 working
This is for 2001 Ranger 4.0l fuse numbering
Could just be some wires got pulled on when removing or reinstalling trans, so also check connectors to make sure wires are in all the way, if a pin gets pulled on it won't make contact with other side of connector.
So what is happening is that the shift motor is not turning so transfer case stays in 2WD.
When you change selector to 4WD high what do the lights do?
Flashing then steady light usually means shift motor moved to correct position, just flashing means it did not move.
No lights = no power
The shift motor itself has the position contacts inside, so when motor turns these contacts are moved into a position where 2 line up and pass power back to 4WD system module to confirm correct position and light goes steady.
You can usually hear the motor turn.
Have you looked at the fuses.
In engine fuse box #13 20amp
In cab fuse box #5, #9, #10, #11 and #28, all play a part in 4x4 working
This is for 2001 Ranger 4.0l fuse numbering
Could just be some wires got pulled on when removing or reinstalling trans, so also check connectors to make sure wires are in all the way, if a pin gets pulled on it won't make contact with other side of connector.
Last edited by RonD; 11-22-2015 at 02:34 PM.
#4
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#5
Ok so all that checks out. I've got power to the shift motor and the position sensor. Back tracked a little. I have no power at the connector to the switch on the dash. I'm befuddled.
#6
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The switch is similar to cruise control switch, I wouldn't think there wouldn't be much voltage there, maybe 5volts.
switch has 3 resistors inside, 1 for each switch position.
Yellow/blue wire and White/blue wire are the control wires
Other 2 wires are for dash lights, back light
When switch is off voltage should still be passing thru switch, looks like from white to yellow as yellow is listed as signal return.
Both wires are hooked to 4WD module
switch has 3 resistors inside, 1 for each switch position.
Yellow/blue wire and White/blue wire are the control wires
Other 2 wires are for dash lights, back light
When switch is off voltage should still be passing thru switch, looks like from white to yellow as yellow is listed as signal return.
Both wires are hooked to 4WD module
#7
Switch timing !
I had this problem ! With the e-brake applied engine off ignition on shifter in netural place the 4x4 switch to 4x4 loosen the 2 screws on the switch on the trans & slowly turn to time the switch as it will engage when you make timing contact area . secure the screws. My thoughts Bud
#8
The switch is similar to cruise control switch, I wouldn't think there wouldn't be much voltage there, maybe 5volts.
switch has 3 resistors inside, 1 for each switch position.
Yellow/blue wire and White/blue wire are the control wires
Other 2 wires are for dash lights, back light
When switch is off voltage should still be passing thru switch, looks like from white to yellow as yellow is listed as signal return.
Both wires are hooked to 4WD module
switch has 3 resistors inside, 1 for each switch position.
Yellow/blue wire and White/blue wire are the control wires
Other 2 wires are for dash lights, back light
When switch is off voltage should still be passing thru switch, looks like from white to yellow as yellow is listed as signal return.
Both wires are hooked to 4WD module
Last edited by 1badwelder; 11-30-2015 at 11:31 AM.
#9
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