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Seat Switch Replacement
 
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Pelican Technical Article:

Seat Switch Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$200

Talent:

***

Tools:

Flathead screwdriver, T25 Torx, 14mm socket

Applicable Models:

Volvo V70 (1998-01)
Volvo V70 2.4T (2001)
Volvo V70 AWD (1998-99)
Volvo V70 GLT (1998-00)
Volvo V70 GLT SE (2000)
Volvo V70 R (1998)
Volvo V70 R AWD (1999-00)
Volvo V70 T5 (1998-01)
Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Seat switches

Hot Tip:

Be careful not to damage seat trim panel when removing

Performance Gain:

Proper power seat function

Complementary Modification:

Clean under your seat

Volvo V70 front seats are electrically operated for position, inclination and height. Seat control switches are mounted to the side of the front driver and passenger seats. There is also an optional memory function for each seat with positions that can be programmed for different drivers. Seat memory is tied in to the steering wheel position and outside rear view mirror as well. When the driver presses one of the seat memory buttons, the seat, steering wheel and mirror adjust automatically.

Seat switches fail and wear out over time, leaving you with a non-functioning seat. I have seen cases where the switches have been stepped on by a child or hit with something and broken. If you are left to deal with any of these problems, this tech article will show you how to replace the seat switches.

If you have a stuck seat and want to test the switch, you can test the output of the switch to each motor and manually activate motors to test them. First check the fuses. On my subject vehicle a 1999 V70XC, fuse C35 and circuit breakers 39 and 40 power the seat switches. Once you confirm the switches have power, operate the switch and monitor the motor you are attempting to run for power and ground. You can manually operate a motor using fused power and ground directly to the motor. When testing seat motors, be sure to keep yourself and your clothing clear of the seat, as it could move. You don't want to get snagged or pinched while working on it.

Interior trim pieces and switches in Volvo V70 models are made of preformed hard plastic. Plastic clips or metal screws are sometimes used to hold them in place. To avoid marring the trim, work with a plastic prying tool or wrap a screwdriver tip with masking tape before prying out trim panels, switches or electrical accessories.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The left side seat switch is covered in this tech article. The right side is similar.

Working below the seat cushion, press the release tab (red arrow) and pull the electrical connector straight out.
Figure 1

Working below the seat cushion, press the release tab (red arrow) and pull the electrical connector straight out.

Working at the side of the seat, pull the trim panel off starting at the front.
Figure 2

Working at the side of the seat, pull the trim panel off starting at the front. Pull it up and tilt it toward the rear of the vehicle (red arrow). Once tilted up, pull the rear of the trim panel off the seat (green arrow).

This photo shows the clips you have to detach to remove the trim piece.
Figure 3

This photo shows the clips you have to detach to remove the trim piece. The red arrow points to the front clip; this one detaches when pulled up. The green arrow points to the rear clip. Once the trim piece is tilted up it detaches by pulling up.

Place the trim piece on a workbench covered in a blanket.
Figure 4

Place the trim piece on a workbench covered in a blanket. Remove the three seat switch T25 Torx screws (green arrows).

Cut the zip tie securing the switch harness to the trim piece (green arrow).
Figure 5

Cut the zip tie securing the switch harness to the trim piece (green arrow).

Slide the switch out of the panel and feed the wiring harness out of the trim panel hole (green arrow).
Figure 6

Slide the switch out of the panel and feed the wiring harness out of the trim panel hole (green arrow). Reverse these steps to install the new switch.

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