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Which fuse controls the memory seats? - Cars & Trucks

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Have a look in your owners manual for fuse location and identifacation . It should say there.

Posted on Apr 06, 2015

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Posted on Jan 02, 2017

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2009 Buick Lucerne, power driver seat won't adjust on seat or through memory button. Passenger seat works fine. Heater for both seats won't turn on. Checked fuses and relays, all ok


Your best bet , have it checked for DTC'S - diagnostic trouble codes first ! Electronic control modules involved ! Can't check with a OBD 2 code reader , need advanced scan tool . No codes , check B+ voltage and ground to the module .
Power Seat Inoperative (With Memory A45)
Memory Seat Feature Inoperative
Circuit/System Description
Battery voltage is supplied at all times to the memory seat module (MSM) from the MDL-MEM 10A fuse located in the rear fuse block. This voltage is used by the MSM for logic power and to supply battery reference voltage to the seat and lumbar adjuster switches. Battery positive voltage is also supplied at all times to the MSM from the PWR SEAT 25A circuit breaker. This voltage is connected to a power rail internal to the MSM and is used to drive the power seat motors, lumbar motors, and seat heater elements on vehicles equipped with heated seats. Each seat and lumbar adjuster motor is controlled by the MSM through 2 motor control circuits. The MSM connects all motor control circuits on the power rail to a common reference point whenever they are not in operation. This reference point is biased to approximately 2.5 volts. The MSM checks to see if the reference voltage is shorted to ground or battery before enabling any of the seat or lumbar motors.

Circuit/System Description
Reference voltage is supplied to the memory switch from the driver door module (DDM). When a memory switch is pressed, reference voltage is applied through the switch contacts, a series of resistors and thorough the memory switch signal circuit to the DDM. The door module then sends a serial data message to the memory seat module (MSM) indicating the memory recall request. The MSM then commands the appropriate seat motors to move to the pre-recorded seat positions stored in memory in response to the switch input.

Sep 02, 2017 | 2009 Buick Lucerne

1 Answer

I have a 2006 gmc envoy my seat controls stop working how can I fix this?


Seat controls and drivers memory all go through the body control module. Make sure you have not popped a fuse. It will be a high amperage one. If the fuses are all good, then look at the BCM which is under the drivers seat.

Oct 17, 2016 | 2006 GMC Envoy

1 Answer

What do I look for to fix the Power seats and power tilt steering has no power


A control module ! Electronics The steering column has a tilt/telescoping control system that consists of an electronic control module capable of class 2 serial data communication, a steering column power assembly with positioning motor and sensor, and a steering column control switch. The multi-function lever provides for the control of the headlamp high beams, and the windshield washer and wiper.
The tilt/telescoping steering column in/out/up/down switch is an input to the driver position module (DPM). The tilt/telescoping drive motor is an output function of the DPM.
Steering column memory settings are stored in the DPM. The steering column position sensor is an internal part of the tilt/telescoping motor assemblies, and is an input to the DPM. The DPM uses the position sensor input when storing and recalling memory settings.
Same thing with the seats , electronic control module .
Battery positive voltage is supplied at all times to the memory seat module (MSM) through the battery positive voltage circuit from the POWER SEATS circuit breaker located instrument panel (I/P) fuse block. This voltage is used to power up MSM and also to apply power to the seat motors when commanded. Battery positive voltage from the TILT/TELE SW/MEM SEAT MOD fuse located in the body control module (BCM) fuse block that supplies voltage to the seat adjuster switch and the memory function switch, also supplies voltage to the MSM. The MSM monitors this voltage circuit in order to determine if battery voltage is supplied to the seat adjuster switch. The MSM is grounded through the module ground circuit and G301.
Body Control Module (BCM)
RH footwell, mounted to the toe board, behind the carpet

Nov 05, 2015 | 2006 Cadillac XLR

1 Answer

Comfort control module


check the fuse box for blown fuse

Aug 21, 2013 | Volkswagen Cars & Trucks

1 Answer

2004 Envoy XUV heated seats do not work on both sides. I press the button and the lights come on, when i release the button the lights go out. I checked the fuses mentioned in the articles on this site but...


If other functions such as window controls and power seat controls are normal, here are some possibilities;
1) Circuit Breaker #8 in rear fuse panel
2) Defective Driver Memory Seat Module (under driver's seat)
3) Break in data lines between Driver's Memory Seat Module and Drivers Door Module
4) Fuse 23 & 6 in rear fuse panel

Nov 13, 2012 | 2004 GMC Envoy

1 Answer

I have a 2006 lincoln ls sport and the drivers seat is stuck in one position there is only power to the lumbar


The dirver seat module is attached to the underside of the seat frame. It must be calibrated if replaced. The dealer can use a tool to get failure codes (DTCs) from teh module. 1/2 hour labor charge to extract codes.


Front Seats
The front seats have the following features:
  • Driver memory
  • Power lumbar (optional)
  • Manual lumbar
  • Horizontal, vertical front and rear tilt adjustments (driver)
  • Horizontal, vertical front tilt adjustment (passenger)
  • Power recline
  • Climate controlled (optional)
Adjustment of the seat may be accomplished with the seat control switch located on the side of the seat.
--------------------------------------------------------------------
Principles of Operation
Driver Power Seat - Memory
NOTE: The memory power seat track may stall when operating at 0°C (32°F) or below. Once the vehicle's interior temperature rises above 0°C (32°F), normal operation should return.
The driver power seat is controlled by the driver seat module (DSM). The DSM does not need to be configured, however the driver seat does need to be calibrated when the DSM is installed. The driver seat control switch provides voltage to the DSM when activated. The NEUTRAL position of each driver seat control switch position is a ground state through the seat control switch contacts. A voltage input causes the DSM to power the appropriate motor until the input is removed. Ground is the normal state of the motor circuits through the DSM and is not switched to control the motors. The DSM internally switches the appropriate line from ground to power to adjust the motors.
As the seat is adjusted, the DSM constantly monitors the motor position sensors to record the current seat position. The DSM will remove power from the motor upon termination of the seat control switch input or if the DSM does not see movement from the motor by monitoring the position sensor. The DSM must be calibrated to the seat track it is controlling. For additional information, refer to Seat Calibration. Once the DSM is calibrated to the seat track, it will only allow movement within the calibrated range.
Seat Calibration
The DSM is calibrated using a diagnostic tool. The calibration procedure automatically powers the driver power seat through its full range of motion and records the FULL STOP positions by monitoring the motor position sensors. Once the FULL STOP positions or range of the seat have been recorded, the DSM will only operate within the calibrated range. Any input attempting to drive the seat beyond the calibrated range will be ignored. This calibration is used for all seat control functions including manual switch control and memory recall positioning. During the seat calibration, the DSM may identify a function that is inoperative, such as a position sensor not changing. If the DSM identifies a concern that has a related diagnostic trouble code (DTC), the DSM will set the related DTC at the end of the validation procedure.
The calibration procedure powers the seat track adjustments to the end of their travel, which is determined by the DSM sensing a change of state in the motor position sensors. If there is a concern with the seat track or motor position sensor that limits the travel, the DSM will interpret the stopping point as the end of travel and store the position. The DSM is not able to determine if the seat has moved to its FULL TRAVEL position. It is only capable of monitoring and storing the amount of travel seen by the position sensor changing states.
For additional information on carrying out the power seat calibration procedure, refer to the diagnostic tool operating manual.
Memory Seat
Memory seat positioning can be recalled with the memory switches on the driver door panel or a programmed remote keyless entry transmitter. In either case, the DSM receives a memory recall 1 or 2 command from the driver door module (DDM) over the SCP communication network. The memory recall switches are a hardwired input to the DDM. The DDM also receives the remote keyless entry transmitter signals. Once a valid memory recall command is received from the DDM, the DSM moves the driver seat to the position stored in memory by powering the appropriate motors and monitoring the motor position sensors until the position is reached.
This system allows automatic positioning of the driver seat to 2 programmable positions.
  • To program position 1, move the driver seat to the desired position using the seat control switch. Depress the set button. Within 5 seconds, depress button 1.
  • To program position 2, repeat the previous procedure using the set button and button 2.
  • To recall position 1, depress button 1. To recall position 2, depress button 2.
A position can only be recalled when the transmission selector is in PARK or NEUTRAL. A position may be programmed at any time.
Easy Exit/Easy Entry
The easy exit function moves the seat backwards about 2 inches when the ignition key is removed from the ignition switch. The DSM receives a key out command over the SCP communication network and powers the driver seat rearward. This function will not operate if the seat is less than the travel distance to the end of the track, or the function has been deactivated at the message center driver personality settings. The DSM will also cancel this operation if a valid input command is received, such as the seat control switch or memory recall request.
The DSM will record the current seat position before powering the seat for an easy exit function. This recorded position will be used to return the seat to this position on the easy entry operation. During easy entry operation, the seat is returned to the position previous to the easy exit operation. Easy entry operation will be cancelled if a valid input command is received by the DSM.
Passenger Power Seat
The passenger power seat motors are hardwired to the passenger seat control switch. The circuits are normally at ground through the seat control switch. The individual circuit is switched to power when the specific adjustment position is selected.
-----------------------------------------------------------------------------------------------------------------------------
Visual Inspection Chart Mechanical Electrical
  • Front seat track motors
  • Front seat track binding or obstructed
  • Front seat backrest power recline
  • Lumbar motor
  • Climate controlled seat ducts
  • Driver door module fuse(s):
    • Central junction box (CJB) fuse 7 (5A)
    • CJB fuse 22 (10A)
  • Driver seat module fuse(s):
    • Battery junction box (BJB) fuse 21 (20A)
    • CJB fuse 7 (5A)
  • Passenger power seat BJB fuse 28 (20A)
  • Rear heated seat fuse(s):
    • BJB 11 (20A)
    • CJB fuse 16 (5A)
  • Driver power lumbar BJB fuse 21 (20A)
  • Passenger power lumbar BJB fuse 28 (20A)
  • Driver and passenger climate controlled seat module fuse(s):
    • BJB fuse 26 (30A)
    • CJB fuse 16 (5A)
  • Seat control switch
  • Memory set switch
  • Lumbar seat control switch
  • Seat fan motor
  • Climate controlled seat module
  • Climate controlled seat switch

Jan 14, 2011 | 2001 Lincoln LS

1 Answer

Power mirrors, driver power seat, adjustable pedals all don't work... checked fuses and all ok... Any suggestions?


it sounds like the driver seat module. It controls all of these items.
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buy new at discount at tascafordparts.com

  • The memory mirror is inoperative
  • Driver seat module (DSM).
  • Circuitry.
  • CJB fuse 3 (7.5A).
  • Exterior mirror motor.
  • Mirror control switch.


  • The memory seat is inoperative
  • Circuitry.
  • Seat control switch.
  • Seat track.
  • DSM.
  • PDJB Fuse 109 (30A).
  • Power seat motor.


  • Adjustable brake pedal does not operate correctly — does not operate using the adjustable pedal switch
  • Battery junction box (BJB) fuses:
    • 109 (30A).
  • Circuitry.
  • Switch.
  • Adjustable pedal motor.
  • Driver Seat Module (DSM

Oct 02, 2009 | 2003 Ford Expedition

1 Answer

My side mirros dont work


The exterior mirrors:
  • are controlled by power controls on the LH front door trim panel.
  • are of a foldaway design.
  • may contain turn signal indicators.
  • may be heated when the heated back window glass is activated.
  • may have a programmable recall memory option.
Driver Seat Module
The power driver seat and power exterior mirrors are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option.
---------------------------------------------------------------------
Power Exterior Mirror Operation
The power exterior mirrors are controlled by the DSM and are operational all the time, whether the ignition switch is on or off. Using the power exterior mirror switch, the driver can adjust the driver and passenger exterior mirrors four ways.
-----------------------------------------------------
Visual Inspection Chart Mechanical Electrical
  • Exterior mirror(s)
  • Interior mirror
  • Central junction box (CJB) fuse
  • Circuitry
  • Exterior mirror control switch
  • Exterior mirror motor
  • Interior mirror
  • Driver seat module (DSM)
  • Memory set switch


----------------------------------------------------------------------------------


  1. If the vehicle is equipped with memory exterior mirrors and the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel. Select the vehicle to be tested from the diagnostic tool menu.
    • Check to make sure the program card is correctly installed.
    • Check the connections to the vehicle.
    • Check the ignition switch position.
-------------------------------------------------------------------------------------
  • The mirrors are inoperative
  • Circuitry.
  • Central junction box (CJB) fuse.
  • Exterior mirror control switch.


Apr 07, 2009 | 2003 Lincoln Navigator

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