4x4 won't engage

KenInSalem · 01-28-2006, 12:50 PM

Help, I have swaped out my engaging motor and swithch already and still nothing. I hit the reset at the relay module and the red light comes on for a minute and the goes back out. Any ideas????
Is the light suppose to be on or off?

Muttley77 · 01-29-2006, 07:12 PM

The red light is for the module self test. Disconnect the five and eight wire connectors and turn the ignition switch to run. Then press the button. One flash per second means the module is working a steady light means the module failed the self test and needs to be replaced. Hope this helps.

KenInSalem · 01-30-2006, 02:41 PM

Thank you, I will try tonight.

KJ
What is the proper name for this module so I know what to look for in replacing it???

**DeRocha** · 01-30-2006, 07:55 PM

The shift motor is the device responsible for shifting the T-Case from 2H to 4H and 4L... Check out the Shift motor rebuild Thread for lots of info and pics regarding this part.. Did you swap in a New shift motor or just once from a junk yard? I asked because all too often the old shift motors at junk yards are equally defective and will display the same symptoms.

KenInSalem · 01-31-2006, 04:29 PM

Motor and switch have been checked out. Told they work. The amp guage moves when I press the switch for 4x4 high then it trips the module.

**DeRocha** · 01-31-2006, 11:02 PM

Quote:

Originally Posted by KenInSalem

Motor and switch have been checked out. Told they work. The amp guage moves when I press the switch for 4x4 high then it trips the module.

I'm not sure exactly what you mean by checked out... Is the shift motor new or used? What does trip the module mean? Who tested the shift motor? As I indicated in my earlier post all too often people swap in used shift motors which they were told were good, only to have them fail to engage/actuate the T-Case... This often occurs because the person testing the shift motor just applies power directly to the shift motor's +/-wires and it comes alive and rotates (and proclaimed Good by the tester)... The real problem is the tester didn't test the wires associated to the geared position sensors. These wires supply feedback to the 4x4 control computer in the rear hatch and indicate the current position of the T-Case selector shaft.. Anyway all too often the stop bumper attached to the geared position sensor deteriorates and allows the sensor to move outside it's operational range and the 4x4 control module will do nothing. All you will gear is some relay's clicking, and nothing more...

KenInSalem · 02-01-2006, 08:38 PM

the 4x4 control computer tested ok. I will double check the motor and check out selector shft

01-28-2006, 12:50 PM	#1
KenInSalem Wannabe Elite Explorer Salem Oregon 1992 Explorer Eddie Bauer Join Date: Jan 2006 Posts: 8 Vehicle Specs (Original Poster)	4x4 won't engage Help, I have swaped out my engaging motor and swithch already and still nothing. I hit the reset at the relay module and the red light comes on for a minute and the goes back out. Any ideas???? Is the light suppose to be on or off?

01-30-2006, 07:55 PM	#4
DeRocha NEX Vice President Brockton, MA '93 XLT 4x4 Join Date: Jul 2003 Posts: 6,641 Vehicle Specs	The shift motor is the device responsible for shifting the T-Case from 2H to 4H and 4L... Check out the Shift motor rebuild Thread for lots of info and pics regarding this part.. Did you swap in a New shift motor or just once from a junk yard? I asked because all too often the old shift motors at junk yards are equally defective and will display the same symptoms. __________________ John D-"Search first, Ask questions later" & "You can have my Explorer when you pry the keys from my cold dead hands." <<<Forum Rules >>>My Truck 4x4 Trouble Shooting Guide See how cars work Axle and tire calculators U-joint replacement info/pics Repair info NEX-New England Explorers NEX: Club Events

01-29-2006, 07:12 PM	#2
Muttley77 Wannabe Elite Explorer Ft. Pierce Florida '92 xlt 4x4 Join Date: Jan 2006 Posts: 1 Vehicle Specs	The red light is for the module self test. Disconnect the five and eight wire connectors and turn the ignition switch to run. Then press the button. One flash per second means the module is working a steady light means the module failed the self test and needs to be replaced. Hope this helps.

01-30-2006, 02:41 PM	#3
KenInSalem Wannabe Elite Explorer Salem Oregon 1992 Explorer Eddie Bauer Join Date: Jan 2006 Posts: 8 Vehicle Specs (Original Poster)	Thank you, I will try tonight. KJ What is the proper name for this module so I know what to look for in replacing it???

01-31-2006, 04:29 PM	#5
KenInSalem Wannabe Elite Explorer Salem Oregon 1992 Explorer Eddie Bauer Join Date: Jan 2006 Posts: 8 Vehicle Specs (Original Poster)	Motor and switch have been checked out. Told they work. The amp guage moves when I press the switch for 4x4 high then it trips the module.

02-01-2006, 08:38 PM	#7
KenInSalem Wannabe Elite Explorer Salem Oregon 1992 Explorer Eddie Bauer Join Date: Jan 2006 Posts: 8 Vehicle Specs (Original Poster)	the 4x4 control computer tested ok. I will double check the motor and check out selector shft