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Automatic seat adjustment (front/back) switch is dead

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  • ilovegaslol Jan 15, 2009

    2002 Pathfinder LE here. Have the seat on AUTO for adjustment, well the other day it stopped responding to forward/backward movement! As many have stated before - all other seat functions seem to work (up/down+seat back).. but the seat itself no longer moves/responds although the switch seems to be working.



    HELP!!!

  • pmcc78 Feb 04, 2009

    i have the same problem except, mine front to back just goes dead every once in a while and when the car sits ovenight it starts working again

  • Anonymous Mar 02, 2009

    My seat will not move back and forth but the seat memory still works. I have two buttons for seat memory and those work but cannot readjust for another driver to drive comfortably.

  • jbpepple Mar 23, 2009

    I had it happen also, had to have a new adjuster put on, part number from the dealer is 89039415, had it replaced in 2006 and it just failed again, will cost $340.00 plus labor.
    Would suggest checking with a salvage dealer to buy a used one.

  • jbpepple Mar 23, 2009

    I had it happen also, had to have a new adjuster put on, part number from the dealer is 89039415, had it replaced in 2006 and it just failed again, will cost $340.00 plus labor.
    Would suggest checking with a salvage dealer to buy a used one.

  • brentpierce Apr 24, 2009

    swichback front seat won,t work can you help me what to do

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5 Suggested Answers

  • 3 Answers

SOURCE: Front driver seat adjustments.

I just had this problem fixed with a Tech 2 tool in my '03 yukon xl denali. The seat has a control module underneath of it that controls the 2-position memory, the power seat functions, etc. It needed to be reprogrammed - about $200 at the dealership, or free if you 1) have a good relationship with your service manager, or 2) own or know someone with a Tech 2 tool.

At first I thought it was because I had a Canadian model truck (the headlight switch is stuck "on" at all times no matter what position it's in, and the rear air controls are in celcius and not farenheight).

I'm assuming the switch worked before, and you may have encountered some sort of electrical issue (like a dead battery, or you gave someone a jump, you have a bad ground, you just installed an aftermarket stereo, you used a computer tuner, etc.).

Hope this helps!

Posted on Dec 30, 2008

  • 38 Answers

SOURCE: 1998 Cabrio drivers seat extremely to adjust front

I would have a look if there is not something stuck between the rails.
It is commen for stuff to fall there.

Posted on Jul 11, 2009

97F350diesel
  • 1326 Answers

SOURCE: kia sedona front passenger seat stuck in forward position

Electric or manual??? If electric one of the motors has gone out. If the kids were playing with it they may have held the button down causing the motor to spin while the seat was all the way foward and it will just burn the motor up after so long. Also the switch could be bad. Unfortunatley being that its power there is no way to manually move the seat back without the motor turning or removing the seat and spinning the motor sprocket by hand...

Posted on Sep 10, 2009

Mike2015
  • 9 Answers

SOURCE: seat adjuster not working

The motor could be bad. Try to jiggle the wiring harness CAREFULLY!

Posted on Nov 12, 2009

BeninVa
  • 389 Answers

SOURCE: 2001 VW Beetle. The driver's front seat adjuster

I'm assuming you have manual adjustment seats. There is a spring underneath the seat that locks the end of the lever into corresponding notches in the seat frame rail. That spring has either fallen off or broken.

Posted on Jan 22, 2010

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The front seats for our 2003 Escalade will not move forward or backward and the heat control for the front seats will not work.


Does your Escalade have memory seats ?
There are 2 options of power seat systems available in full size trucks. The 6 way driver and passenger power seats, and 8 way driver and passenger power seats with driver memory. For the driver memory seat operation refer to Memory Seats Description and Operation . Power seats without memory are completely controlled through the power seat switch. Battery voltage is supplied to the power seat switch through the power seat circuit breaker. While the seat adjuster switches are in an inactive state the switch contacts are closed to the power seat switch ground circuit. When a power seat switch is pressed to an active state the switch contact is closed to the battery voltage supply circuit. Each seat adjuster motor is controlled by the power seat switch through 2 motor control circuits. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.

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Is it possible that switch has been installed upside down?

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at the front of your seat(left side for the driver seat & right side for the passenger seat)rite at the curved corner in front of the seat beside your knees, the cloth seat has a hard plastic corner guard over the top directly in the middle of the corner in the front of the seat, and smack in the center is a up & down switch similar to that of the back seat window switch. it is well hidden & I had to have my head down there to discover it in the year2010, on a 1996 auto. the previous owner of the car did not believe me.

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GMC Yukon Seat Switch


You don't mention what year your Yukon is ? This could very well be a control Module problem .
I'll post how the power memory seat's work or are suppose to work !

Memory Seats Description and Operation

Battery voltage is supplied to the memory seat module through a 25 A circuit breaker. The memory seat module supplies the seat adjuster switch assembly with a battery positive reference voltage. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch common circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the reference voltage circuit. Battery voltage on a switch signal circuit indicates to the memory seat module the switch status is active. Each seat adjuster motor is controlled by the memory seat module through 2 motor control circuits. While the seat adjuster motors are in an inactive state the motor control circuits are closed to ground circuit contacts within the memory seat module. The memory seat module operates the seat adjuster motors by switching one of a motors control circuits to battery voltage. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.


Memory Set/Recall Operation
The seat adjuster motors are equipped with internal position sensors. The adjuster motor position sensors are monitored by the memory seat module and are used to determine the seat position when storing or recalling memory settings. The driver seat adjuster motors use potentiometer type position sensors. The position sensors are supplied with a 5 V reference and ground circuits from the memory seat module. The position sensor signal circuits return to an analog input within the memory seat module. During adjuster motor operation the position sensor provides a voltage change proportional to the change in revolution of the adjuster motor shaft. The memory seat module monitors the voltage from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.
The memory recall switch assembly on the driver door provides inputs to the driver door lock/window switch. Battery voltage is supplied to the memory recall switch assembly from the driver door lock/window switch. When a RCL 1, RCL 2, or EXIT switch is pressed, the switch contacts close the appropriate switch signal circuit to the battery voltage supply circuit within the memory recall switch assembly. When the driver door lock/window switch receives active switch signals from the memory recall switch assembly, the appropriate commands are sent to the memory seat module using the GMLAN Serial Data circuit. The Body Control Module software version determines the personalization features available.
Memory seat recall operation is allowed only with the transmission selector lever in the PARK position while the ignition is on. The transmission selector lever position data is provided to the memory seat module by a message through the GMLAN Serial Data circuit.

There are somethings listed you are not familiar with , like GMLAN Serial Data circuit ,maybe Body Control Module software etc... GMLAN is a communincation network that the computers on the vehicle uses to share information , transmit commons etc... you can google it to read about it .

There are DTC'S - diagnostic trouble codes that can set in the module in control . Do you know what DTC'S are .

DTC Descriptors
DTC B1825 01: Driver Seat Recline Position Sensor Circuit Short to Battery
DTC B1825 06: Driver Seat Recline Position Sensor Circuit Short to Ground or Open
DTC B1825 5A: Driver Seat Recline Position Sensor Circuit Plausibility Failure
DTC B1850 01: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Battery
DTC B1850 06: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open
DTC B1850 5A: Driver Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure
DTC B1860 01: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Battery
DTC B1860 06: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open
DTC B1860 5A: Driver Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure
DTC B2355 01: Driver Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06: Driver Seat Front Vertical Position Sensor Circuit Short to Ground or Open
DTC B2355 5A: Driver Seat Front Vertical Position Sensor Circuit Plausibility Failure
DTC B2365 01: Driver Seat Rear Vertical Position Sensor Circuit Short to Battery
DTC B2365 06: Driver Seat Rear Vertical Position Sensor Circuit Short to Ground or Open
DTC B2365 5A: Driver Seat Rear Vertical Position Sensor Circuit Plausibility Failure
DTC B2375 01: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Battery
DTC B2375 06: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Ground or Open
DTC B2375 5A: Driver Seat Assembly Horizontal Position Sensor Circuit Plausibility Failure

5) Memory Seat Module is under the front of the driver seat , you could look under an see if all the connectors are fully seated.

The best diagnostic step would be to hook up the factory scan tool an see what the computer is seeing as far as inputs from the switch an outputs it's sending . I wouldn't suggest you take the seat apart an try testing electrical inputs etc.... unless you very familiar with automotive electrical systems an circuits .

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1 Answer

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