Question about 1998 Isuzu Rodeo

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The 4x4 light is flashin on the dash and it is not goin in to 4x4, but the shift motor is workin, but the front tires are not lockin up

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  • Isuzu Master
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Check the actuator at the transfer case may be damaged ,need adjustment, or stuck not moving actuator rod

Posted on Nov 15, 2009

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Posted on Jan 02, 2017

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I have a 2001 chevy s10 4x4 the fourwheel drive is lockin in but my tires are not spinning? WHAT do I do


Check if the front driveshaft is turning the front diff pinion. If it is then check the axle fork engage operation on the right side of the differential

Feb 28, 2015 | 2001 Chevrolet S-10

1 Answer

4x4 not workin no power to ash switch


CHECK YOUR SHIFT MOTOR ON THE TRANSFER CASE.. IT LOOKS LIKE A WIPER MOTOR.. AND THEN TRACE THE WIRING AND MAKE SURE THEIR IS NO CHAFFING OR BROKE WIRES.. AND YOU MIGHT HAVE TO REPLACE THE SHIFT MOTOR ALSO. GO TO A TRUCK DISMANBLER.. A PICK AND PULL JUNK YARD AND PULL IT OUT FROM THE SAME YEAR/ YEARS YOUR TRUCK MODEL IS IN. AND ALSO THEN YOU WILL KNOW HOW TO CHANGE OUT YOUR'S ON YOUR TRUCK BEFORE HAND.. ALSO CHECK THE SWITCH ON THE DASH THEY ARE CHEAP ENOUGH.. FUSE AND ALSO MAKE SUER THAT ITS IN NEUTRAL BEFORE IT WILL WORK ALSO.

Dec 12, 2014 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

95 chevy k2500 randomly my blower motor doesnt work also when is not workin i cant engage 4x4 floor shift


It sounds to me that you may have a bad ignition switch. not the one on the steering wheel but the electrical part under the dash on the steering column itself.. look under dash at the steering column and see if you see a bunch of wires plugged into a plug on the side of the steering column, if so check first to make sure it still plugged in completely if not you may need a new switch which is bolted to the column with a couple small bolts.. try that.

Feb 20, 2012 | GMC Sierra Cars & Trucks

2 Answers

I have a2001 gmc yukon 4x4 while driving in 2wd the vehicle puls to the right to correct we stop & push the2wd dash button & this fixes the problem for a time


need to have it hooked up to computer check for transfer case codes ,alot of times the 4x4 shift motor gets out of time and has to be repaired.or wiring could be damaged

Dec 24, 2010 | 2001 GMC Yukon XL

1 Answer

99 Chevy Silverado 4x4 not working No light on 4x4 Selector Panel


Your brake an CV joint issue can't an won't cause your 4X4 problem . The 4x4 system has a control module which supply's B+ voltage to the switch . Checking for codes in the 4X4 control module should have been the first step . Your best bet , take it to a qualified repair shop . You don't have the knowledge or test equipment to fix this.
SERVICE indicator (4WD/AWD) Lamp
The SERVICE indicator (4WD/AWD) lamp is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle of malfunctions within the automatic transfer case (ATC) system. The SERVICE indicator (4WD/AWD) lamp is controlled by the transfer case shift control module via CKT 1567.

Transfer Case Shift Control Module
The transfer case shift control module uses the VIN information for calculations that are required for the different calibrations used based on axle ratio, transmission, tire size, and engine. The system does not know which calibration to use without this information.
The direct battery supply line (CKT 1640) provides the power to the module and motor circuitry.
Transfer Case Encoder Motor
The transfer case encoder motor consists of a permanent magnet (PM) DC motor and gear reduction assembly. It is located on the left hand side (drivers side) of the transfer case. When activated it turns the sector shaft of the transfer case (clockwise or counter clockwise) to shift the transfer case. The encoder motor is controlled with a pulse width modulated (PWM) circuit within the transfer case shift control module. This circuit consists of a driver on both the Motor A and Motor B circuits. The encoder motor is bi-directional to allow the motor to shift the transfer case from 2HI or 4HI to NEUTRAL and 4LO positions.
Do you know what DTC'S are ?
DTC B2725 ATC Mode Switch Circuit Malfunction
DTC C0300 Rear Speed Sensor Malfunction
DTC C0305 Front Speed Sensor Malfunction
DTC C0308 Motor A/B Circuit Low
DTC C0309 Motor A/B Circuit High
DTC C0310 Motor A/B Circuit Open
DTC C0315 Motor Ground Circuit Open
DTC C0323 T-Case Lock Circuit Low
DTC C0324 T-Case Lock Circuit High
DTC C0327 Encoder Circuit Malfunction
DTC C0367 Front Axle Control Circuit High
DTC C0374 General System Malfunction
DTC C0376 Front/Rear Shaft Speed Mismatch
DTC C0387 Unable to Perform Shift
DTC C0550 ECU Malfunction
DTC C0611 VIN Information Error

Aug 27, 2017 | 1999 Chevrolet Silverado 1500

1 Answer

Ihave 01 sporttrac my 4wheel drive use 2 lockin 4 wheel high only that stopped working and then the back window stopped working any suggestions?


most likely the 4x4 shift motor is not working need to bring it to a repair workshop. rear window regulator sometimes get stuck try someone to push the switch while you tap the motor lightly

Feb 05, 2010 | 2001 Ford Explorer Sport Trac

2 Answers

4wd does not work


Electronic Shift On the Fly (ESOF) Operation
The ESOF system is an electronic shift 4x4 system that allows the operator to choose between two different 4x4 modes as well as 2-wheel drive. The operator can switch between 2WD and 4WD HIGH mode at speed. To engage or disengage LOW Range, the vehicle speed must be less than 5 kph, the brake depressed, and the transmission must be in NEUTRAL.

The transfer case is equipped with an electromagnetic clutch which is located inside the case. This clutch is used to spin up the front drive-line when shifting from 2WD to 4x4 High mode at speed. When the control switch on the instrument panel is turned, the generic electronic module (GEM) recognizes that a shift has been requested and activates the electromagnetic clutch and the relays which power the transfer case shift motor. When the shift motor reaches the desired position as determined by the contact plate position inputs to the GEM, power to the shift relays and motors will be removed. When the transfer case front and rear output shafts are synchronized, the spring loaded lockup collar mechanically engages the main-shaft hub to the drive sprocket. Finally, the front axle collar is engaged and the electromagnetic clutch is deactivated.

Shift Between 2WD and 4x4 HIGH:
Shifts between 2WD and 4x4 HIGH can be made at speed. Listed below are the inputs and outputs needed by the GEM to execute a change between any of these modes.

Feature Inputs:
*4WD Mode Switch (Various resistances).
*Contact Plate Position Inputs A, B, C, D (grounded when closed, open circuit when open).

Feature Outputs:
*4x4 Shift Motor Relay Outputs
*Transfer Case Clutch Relay (grounded when relay is on, open circuit when relay is off).
*4x2/4x4 Vacuum Solenoid (grounded when activated, open circuit when deactivated).
*Cluster Indicators (ground when activated, open circuit when deactivated).

Shifting Into/Out of 4WD LOW:
When shifting into or out of 4WD LOW, the GEM requires that the vehicle speed be less than 5 kph, the brake is applied, and the transmission is in NEUTRAL.

Feature Inputs:
*4WD Mode Switch (Various resistances).
*Contact Plate Position Inputs A, B, C, D (grounded when closed, open circuit when open).
*VSS Sensor (Sinusoid Signal: 0.7V-20V, 2.2 Hz/mph).
Brake Input (battery voltage when brake is depress, open circuit when not activated).
*Transmission Range Sensor (grounded when transmission is in NEUTRAL, open circuit otherwise).
8Start/Clutch Depressed Input

Feature Outputs:
*4x4 Shift Motor Relay Outputs
*4x2/4x4 Vacuum Solenoid (grounded when activated, open circuit when deactivated).
*Cluster Indicators (grounded when activated, open circuit when deactivated).

4WD Mode Switch
A rotary switch allows the vehicle operator to choose between 2WD, 4WD HIGH, and 4WD LOW modes of 4x4 operation.

GEM Module
The Generic Electronic Module (GEM) controls the operation of the 4x4 system

Vehicle Speed Sensor
The vehicle speed sensor (VSS), mounted in the rear of the transfer case, informs the GEM of the vehicle speed.

Transfer Case Shift Motor Sense Plates

The shift motor sense plate, an integral part of the electric shift motor, informs the GEM to the positions of the transfer case

Transmission Range Sensor
Located on the left side of the transmission, this sensor informs the GEM when the transmission is in the NEUTRAL position.

Electric Shift Motor
The electric shift motor, mounted externally at the rear of the transfer case, drives a rotary cam which moves the mode fork and range fork within the transfer case to select between the 2WD, 4WD HIGH, and 4WD LOW positions.

4x4/4x2 Vacuum Solenoids
These two solenoids are attached to the upper RH side of the engine compartment dash, and alternately route vacuum to the vacuum motor which engages/disengages the center axle disconnect collar in the front axle assembly.

4x4 Shift Motor Relay
A module containing two relays which under the control of the GEM, shift the transfer case shift motor between the 2WD, 4WD HIGH, and 4WD LOW modes.

Transfer Case Clutch Relay
An electromechanical relay is used to activate the transfer case clutch within the transfer case.

Good luck and hope this helps,but start with the simple and check the fuses and wire harness. Both white/light blue stripe wires should have 12V in run. The GEM will ground the left side (closest to engine) solenoid to disengage the front axle. It will ground the the right side solenoid (closest to fender) to engage the front axle. If the GEM doesn't see Neutral it will not let the truck come out of 4Lo. If the GEM had water leaking on it it may well be the root of the problem. The shift motor only has power when the GEM sends it a signal to move the shift lever. Once the shift is completed the motor shuts off. There are 2 wires that control the shift motor. A yellow and an orange. The GEM alternates between 12v and Ground to these wires to control which way the motor turns. The GEM uses the transfer case shift relay module to control the power to the motor. There are contact plates inside the shift motor assembly that indicate the position that the shift lever is in. This is what the GEM used to know what the T-case is doing. Any one of these components can fail.







Jan 10, 2010 | 2002 Ford Explorer

1 Answer

01 f150 4x4 4whell drive will not engage lights on dash come on


I am going to assume that you have auto 4x4, and not manual shift base model.. it just sounds like the servo motor that shifts between 2x4 and 4x4, has gone bad

question:
does it still engage into low range, even though it is stuck in 2x4?

Feb 08, 2009 | 2001 Ford F150 Styleside SuperCrew

2 Answers

Tacoma 4x4 not engaging


Do you have all 4 tires matched to each other? If you have 1 worn and 3 new, expect problems. Also, 2 tires on the front from 1 mfgr and 2 on the rear from a different mfgr will cause no 4WD. If all 4 tires match, put it in 4WD and tap on the transfer case and the front shift mechanism on the front axle. One or the other may be stuck, assuming that the 4WD fuse is good. The fuse is in the fusebox under the dash.

Dec 29, 2008 | 1998 Toyota Tacoma

2 Answers

1997 ford f150 4 wheel drive not working


I'll assume that you have a 4x4 switch on the dash; check the shifting motor and plug on the transfer case, or the digital output from the GEM module which controls the 4x4 operation.

Dec 04, 2008 | 1997 Ford F150 Regular Cab

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