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4x4 don't work no indicator light on dash

Checked fuses and relays changed 4x4 switch module

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  • Cars & Trucks Master
  • 11,496 Answers

Did you check for codes in GEM module ?
Many system components are involved in the proper operation of the ESOF hubs. Before diagnosing the hublocks themselves as the cause of 4X4 concerns, be sure to verify all related system components.
After removing the hublock retaining ring be sure not to use tools other than hands or "grip" gloves to remove the hublock, as damage may occur to either the paint or the function of the hublock. Pliers or locking Channel-Locks® should be considered as a last resort, and will usually damage the hublock, making it necessary to install a new hublock.

Inspection and Verification - Electronic Shift

  1. Visually inspect for the following obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Hublocks
    • installed
    • correct type
  • Axle shafts and universal joints
  • Driveshaft and universal joints
  • Shift linkage
  • Fluid leaks
  • Matching tire size
  • Vacuum harness
  • Central junction box (CJB) fuse 59 (30A)
  • Central junction box (CJB) fuse 27 (15A), 34 (10A)
  • 4WD control module
  • Pulse vacuum hublock (PVH) solenoid
  • Wiring harness
  • Mode select switch (MSS)
  • Gearmotor encoder assembly
  • Connector(s)
  • Shift relays
  • Circuitry

  1. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
  1. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
    • CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00 .
    • NO RESP/NOT EQUIP for 4WD control module, Go To Pinpoint Test D .
    • NOTE: To carry out the 4WD control module self-test for Excursion requires the headlamps to be in the OFF position. All others require the headlamps to be in the ON position. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the 4WD control module self-test.
  1. If the DTCs retrieved are related to the concern, go to the 4WD control module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If no DTCs related to the concern are retrieved, carry out the electronic shift function test. Refer to Function Test - Electronic Shift in this section.

Posted on Dec 12, 2014

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No communication from computer to 4wheel drive changed push button on dash still no lights on


Some vehicles have a module for the 4x4 under the passenger side dash. Most likely it is the motor on the transfer case that is bad. Year, make, and model?

Jan 25, 2015 | Cars & Trucks

1 Answer

High beam indicator comes on with fog lights


Could your Mazda have daytime running lights? If you checked all fuses, did that include the three in the joint box?

There is an auto light-off control module that is central to all functions you describe. It is assumed that you would only turn on the fog lights with headlights on and set for high beam. If you set the headlight switch to LOW, the module closes the headlight relay to turn on the low beams. If you then turn the headlight switch to HIGH, the module turns on the high beams and allows you to turn on the FOG LIGHT switch, closing the fog light relay and turning on the fog lights. Since this sequence is not working, I suggest checking both high beam lamps as both could be burned out. Other possibilities are a defective headlight switch or the module

Oct 01, 2012 | 2005 Mazda 6

1 Answer

Dash lights and running lights dont work


At the instrument panel fuse block, check 15A fuse 10 (indicators). In the relay center, check 10A fuse 8 (speedometer).

For "back lights" problem: At the left underhood fuse block, check the 20A HEADLAMP BREAKER. At the instrument panel fuse block, check 15A fuse 6C. Both of these supply power to the lamp control module. If you set the park lamp switch to the on position, the tail part of the tail/stop/turn lamps should light, the separate tail lamps should light, the license lamps should light, and the rear marker lamps should light. If any of these don't light check for burned out lamps, bad sockests, and bad wiring or missing grounds (black wires)

Sep 23, 2012 | 1994 Buick LeSabre

1 Answer

I need to know were to find the DRL Module for a 2003 F-150 4x4. My hi and low beem lights work ok , and the auto light sencor works . Its that my Day time running lights do not come on .


The wiring diagram does not show a stand alone drl module for the 03 f150. However it shows 2 drl
relays located in aux. relay box #2 located behind the right side of the dash, left of the glove box.
Also there is the drl resistor located behind the grill, right of the left headlight. Relay #1 is fused at
fuse #5-15a in the fuse block under the left dash. Relay #2 uses fuse #26-10a under left of dash.
Hope this helps.

Nov 17, 2010 | Ford F-150 Cars & Trucks

3 Answers

2002 Dodge Sport 1500 4x4, Dash lights wont come


Make sure the wires aren't bent. Took forever to figure out why my breaklights wouldn't work and low and behold.....

Mar 08, 2010 | 1999 Dodge Ram

1 Answer

I HAVE A 93 S15 JIMMY 4X4. NO POWER TO 4X4 SWITCH


Try pulling the 5 amp fuse on the fuse box under the drivers side of dash that says tccm (transfer case control module) for 2 1/2 minutes, replace the fuse after 2 1/2 minutes then cycle the switch on and off without starting the engine 5 times. This resets the module.

Dec 06, 2009 | 1993 Chevrolet S-10 Blazer

1 Answer

I have a 99 GMC Jimmy with the 4 wheel drive. I


check fuse and relay to switch if power to switch retest switch new doesnt mean not defective if no power check connections and wiring for damage or breaks

Dec 02, 2009 | 1999 GMC Jimmy

2 Answers

4 wheel drive not working


if your dash is not lighting up , check your tail lights
they are often on the same circut
if these are out you can be sure its a fuse


May 05, 2009 | 2000 Ford F250 Super Duty Crew Cabs

1 Answer

Ford 2005 4x4 problem.


2-Speed Torque-On-Demand (TOD) Operation
The automatic 4-wheel drive (A4WD) system is a 2-speed torque-on-demand (TOD) operation that utilizes the following components:
  • Transfer case
  • 4-wheel drive (4WD) control module (integral to the powertrain control module [PCM])
  • Mode select switch (MSS)
  • Gearmotor encoder assembly (part of the transfer case shift motor)
  • Transfer case shift motor
  • Shift motor sense plate (part of the gearmotor encoder assembly)
Principles of Operation
Transfer Case Shift Motor The externally mounted transfer case shift motor, located at the rear of the transfer case, turns the shift cam assembly. As the shift cam assembly turns, it positions the reduction shift fork for desired transfer case operation. An integral position sensor in the shift motor provides shift motor position information to the 4WD control module.
Mode Select Switch (MSS) The push button MSS, mounted on the instrument panel, allows the operator to select the 4x4 Auto, 4x4 High, and 4x4 Low transfer case operating modes. The indicator light, on the instrument cluster push button, will illuminate only when the 4x4 Low position is engaged.
Visual Inspection Chart Mechanical Electrical
  • Axle shafts and CV joints
  • Driveshaft and universal joints
  • Fluid leaks
  • Matching tire sizes
  • Transfer case shift motor
  • Battery junction box (BJB) fuses:
    • 8 (30A)
    • 17 (5A)
    • 18 (20A)
  • Central junction box (CJB) fuses:
    • 12 (5A)
    • 24 (15A)
  • 4x4 module (PCM)
  • Wiring harness
  • Gearmotor encoder contact plate
  • Connector(s)
  • Circuitry
  • Mode indication switch (MSS)

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the concern is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for 4WD module (PCM), Go To Pinpoint Test G .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the 4WD module (PCM) self test.
  1. If the DTCs retrieved are related to the concern, go to the 4WD Control Module (PCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics. 4WD Control Module (PCM) Diagnostic Trouble Code (DTC) Index
    DTC Description Source Action B1317 Battery Voltage HIGH 4WD Module (PCM) REFER to Section 414-00 . B1318 Battery Voltage LOW 4WD Module (PCM) REFER to Section 414-00 . B1319 Driver Door Ajar Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . B1322 Driver Door Ajar Circuit Short To Ground 4WD Module (PCM) Go To Pinpoint Test M . B1342 ECU is Defective 4WD Module (PCM) CLEAR the DTCs. REPEAT the 4x4 module (PCM) self test. If DTC B1342 is retrieved, INSTALL a new 4x4 module (PCM). REFER to Section 303-14 . CLEAR the DTCs. REPEAT the self test. B1483 Brake Pedal Input Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . B1485 Brake Pedal Input Short to Battery 4WD Module (PCM) Go To Pinpoint Test M . C1729 Transfer Case Unable to Transition Between 4H and 4L 4WD Module (PCM) Go To Pinpoint Test K . C1970 4WD Low Mode Switch LED Short to Battery 4WD Module (PCM) Go To Pinpoint Test K . C1971 4WD Low Mode Switch LED Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1707 Transfer Case NEUTRAL or PARK/NEUTRAL Indication Circuit 4WD Module (PCM) Go To Pinpoint Test M . P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1816 Transmission NEUTRAL Safety Switch Circuit Failure 4WD Module (PCM) Go To Pinpoint Test M . P1819 Transmission NEUTRAL Safety Switch Circuit Short to Ground 4WD Module (PCM) Go To Pinpoint Test M . P1820 Transfer Case Clockwise Shift Relay Coil Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1822 Transfer Case Clockwise Shift Relay Coil Circuit Short To Battery 4WD Module (PCM) Go To Pinpoint Test K . P1824 4-Wheel Drive Clutch Relay Circuit Failure 4WD Module (PCM) Go To Pinpoint Test H . P1826 4-Wheel Drive Low Clutch Relay Short Circuit to Battery 4WD Module (PCM) Go To Pinpoint Test H . P1827 4-Wheel Drive Low Clutch Relay Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test H . P1828 Transfer Case Counterclockwise Shift Relay Coil Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1830 Transfer Case Counterclockwise Shift Relay Coil Circuit Short To Battery 4WD Module (PCM) Go To Pinpoint Test K . P1849 Transfer Case Contact Plate A Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1853 Transfer Case Contact Plate B Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1857 Transfer Case Contact Plate C Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1861 Transfer Case Contact Plate D Short Circuit to Ground 4WD Module (PCM) Go To Pinpoint Test K . P1867 Transfer Case Contact Plate General Circuit Failure 4WD Module (PCM) Go To Pinpoint Test K . P1891 Transfer Case Contact Plate Ground Return Open Circuit 4WD Module (PCM) Go To Pinpoint Test K . U1900 CAN Communication BUS Fault 4WD Module (PCM) REFER to Section 418-00 . U2023 External Node Fault 4WD Module (PCM) REFER to Section 418-00 . U2051 One Or More Calibration Files Missing/Corrupt 4WD Module (PCM) Reprogram/Reflash the 4x4 module. REFER to Section 418-00 . - For All Other DTCs 4WD Module (PCM) REFER to Section 418-00 .
  2. Your best bet mite be to take it to a qualified repair shop !

May 30, 2017 | 2005 Ford Explorer

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