92 explorer 4x4. hi , lo lights do not light up when pushed. manual says to unplug 2 conecters from computer and press test switch light flashes 4 times. book says flash steady or not at all, good/bad. have swapped switch and controler no change. tested all ckts motor reads 1.3 ohm, clutch reads 5 ohm, speed sensor is 272 ohm and encoder reads 2hi. power and grounds are ok. thanks doug

It could be a junk switch or it could be bad contacts inside the transfer case motor.. Does the transfer case switch to the selected gears? Everytime? If so, you might try another switch. If it does the same, I would say the motor contacts are bad. Replace the motor if you want the lights, But I personally wouldn't do it until the motor quit switching gears. They're not cheap.

On these issue, there are few solved help links for troubleshooting the issue easily.-------

Click the link below: ---

No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

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4X4 Truck makes roaring noise in the front end?

http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html

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Car will not go into 4WD high or 4WD low?

http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

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No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

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4 wheel drive system will not disengage?

http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html

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4WD light is flashing and beeping? NO 4WD high?

http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html

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2002 Jeep Wrangler: 4WD Idiot Light is ON?

http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html

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Traction control switch will not engage on 4WD High or Low

http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html

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4WD light flashing and 4WD will engage after few minutes

http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html

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2008 Toyota Tundra: 4x4 Wheel Drive Light is Flashing?

http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html

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4x4 front differential will not engage the axle on ford?

http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html

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4x4 will not engage on Ford F150?

http://technoanswers.blogspot.in/2012/02/4x4-will-not-engage-on-ford-f150.html

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Dodge Ram 4x4 light keeps flashing

4X4 LOW LIGHT IS FLASHING ON DASH

http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html

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Ford 4x4 front wheels will not engage?

http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html

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These details will help.

Thanks.

Sounds like the encoder switch is bad ..it on the transfer case .it has a motor with wires going to it.when you press the button it sends a signal to that motor to switch into a certain gear..

Have you performed the system relearn after you replaced these parts?? This must be done after the TCCM, transfer case motor, or switch is replaced. DIsconnect the battery for at least 2 and a half minutes. Reconnect the battery. Cycle the ignition key 5 times to the run position, then to the off position. Allow 1-2 seconds after you turn it ON, before you turn it OFF during the 5 cycles. After this start the vehicle, and the system is now reset. It may or may not fix your problem, but it needs to be done after any 4x4 part is replaced.

First and foremost can you tell me if the lights are showing up on the 4x4 selector switch ? Second if they are illuminated ( should be in 2-Hi ) when you select to go into 4-Hi or 4-Low does the selection flash? And Lastly can you hear a sound of any type (clicking, ticking, thumping) when you push the button?

there is a neutral switch tied into the transmission, the transfer case will not shift into 4 hi unless the trans is in neutral or park, and 4low only if the trans is in Neutral and the transfer case is in 4hi. CHECK- transmission neutral switch, transfercase feedback switches.

4x4 selonoid switch in the transfer case was gone

Being that its a Ford you may need to check or change the switch or there is a problem (be it electrical or mechanical) with the transfer case. Hope this was helpful

Good Luck =)

Hi my name is Juan and I do own a trailblazer with the same year 2002 and I read the problem you have let me try to help you Have you try to shift to 4hi with your transmission in neutral ? the transmission needs to be in neutral in order to shift the transfer case to 4hi and the vehicle needs to be completely stooped also is your service 4wd light on?? if the light is on your transfer case needs service and it can be as simple as the switch inside your car or a solenoid that has not been detected by the computer

Gm has had a huge problem with their 4x4 switches on those models. Replace the switch it's about a 10 minute job.The switch is about $70.00