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TSB 23-28-99

Power Seat Track Vertical Adjustment
Stuck In A Full Upward Or Full Downward Position.

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Date:

Models: 1998 - 1999 (BR/BE) Ram Truck

NOTE: THIS BULLETIN APPLIES TO CLUB OR QUAD CAB VEHICLES BUILT BEFORE MARCH 1, 1999 (MDH 0301XX).

Discussion:

This bulletin involves removing existing lubrication on the power seat track adjustment lead screws and then applying a new lubricant.  

Symptoms:

The front and/or rear power seat track vertical adjuster motors are stuck in a full upward or full downward position.  

Diagnosis:

1 .  Verify the operation of both front and rear vertical power seat track adjusters.

2.    If any of the vertical power seat track positions do not function, remove the bolts attaching the seat cushion frame to the mounting brackets. The bolts can be accessed from the underside of the seat (Figure 1). Position the seat cushion out of the way but leave the wire harness connector connected.  

3.    Attempt to free the seized condition by lifting the outboard end of the affected vertical drive motor upward approximately 6 mm (1/4 in.) (Figure 2). If you feel a "pop," you have freed the seized condition. Immediately reposition the seat adjuster to a new position using the adjustment switch located on the seat side shield, then perform the Repair Procedure to prevent the condition from reoccurring.

 

1 - SEAT CUSHION MOUNTING BRACKETS
2 - FRONT VERTICAL ADJUSTMENT MOTOR
3 - REAR VERTICAL ADJUSTMENT MOTOR
A - LIFT THE MOTOR IN THIS LOCATION IF THE FRONT VERTICAL ADJUSTMENT MOTOR IS JAMMED
B - LIFT THE MOTOR IN THIS LOCATION IF THE REAR VERTICAL ADJUSTMENT MOTOR IS JAMMED


FIGURE 2

NOTE: BOTH VERTICAL MOTORS SHOWN IN THE FULL UP POSITION.

4.    If when performing Step 3, you did not feel the "pop," attempt to free the seized condition by wrapping the exposed portion of the seat adjuster lead screw in a shop cloth (Figure 3). Then, clamp onto the lead screw with adjustable locking pliers. Apply rotational torque to the lead screw to free the seized condition. Only a +/- 5 degrees of rotational torque is required to free the seized condition. Once the seized condition has been eliminated, immediately reposition the seat adjuster to a new position using the adjustment switch located on the seat side shield, then perform the Repair Procedure to prevent the condition from reoccurring. If the lead screw is not seized and the front or rear vertical seat track adjusters do not function, further diagnosis is required. Refer to the appropriate Service Manual Group SR for information regarding power seat system electrical diagnosis.

 

1 - SEAT TRACK ADJUSTMENT LEAD SCREW
2 - SEAT TRACK DRIVE NUT
3 - LEAD SCREW SHOWN IN FULL UP POSITION - LEAD SCREW MAY SEIZE IN THIS POSITION


FIGURE 3

NOTE: BOTH VERTICAL MOTORS SHOWN IN THE FULL UP POSITION.

Parts:

1   05017414AA     Lubricant, Power Seat Track  

Repair:

THIS REPAIR IS COMPATIBLE WITH DAIMLERCHRYSLER'S MOBILE SERVICE PROGRAM AND IT DOES NOT REQUIRE HOISTS OR OTHER FULL SERVICE FACILITY SPECIAL EQUIPMENT.

1.    Using a shop cloth, clean all surplus lubrication from both front and rear vertical seat track adjustment lead screws. It may be necessary to operate the adjustment motor in both directions to remove all of the surplus lubricant.

2.    Once all surplus lubricant is removed, apply a thin coating of Power Seat Track Lubricant p/n 05017414AA to both front and rear vertical seat track adjustment lead screws. Make sure that the lubricant is applied to the lead screw both fore and aft of the drive nut.

3.    Operate both front and rear vertical power seat track adjusters full up/down at least three times to ensure that the lubrication has worked into the threads. Wipe off any large globs of the new lubricant.

4.    Position the seat cushion onto the seat track.

5.    Align the mounting holes on the seat cushion mounting bracket with the attachment holes on the cushion.

6.    Install the bolts attaching the cushion to the seat cushion mounting brackets. Tighten the bolts to 25 Nom (1 8 ft. lbs.). 

notes:

POLICY:    Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:
Labor Operation No: 23-13-60-93 ................................................................ 0.3 Hrs.

FAILURE CODE:  P8 - New Part


Thanks to Bob Bergevin for supplying this TSB information

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This page was edited on: May 3, 2004