Seat - Heating Element, Backrest And Cushion Replacement
Group85
No.
701
Date
April 1989
THIS BULLETIN APPLIES TO THE U.S. AND CANADA REFERENCE: TP31127/1 (ENGLISH); BODY
The new seat heating element is not suitable for 740's or 760's prior to 1988. Some Modification is required to replace the element in earlier models.
Parts Block
For normal output element:
Thermostat P/N 3521779-3
Quantity 1
Replacement of backrest heating element
Remove storage pocket
Remove cushion (remove upholstery rails)
Remove:
- backrest adjuster cover (press out backwards using thin screwdriver)
- backrest adjusting mechanism covers on both sides
- lumbar support adjusting knob and guide
Remove clamps at bottom edge of upholstery
Pull away upholstery slightly and unhook clamps from center attachments at rear of seat.
High-output element (3-position switch):
Disconnect single-pole connector (SB).
Disconnect three-pole connector and push out pin on black (SB) lead.
Normal-output element (2-position switch):
Disconnect four-pole connector.
Push out pins on leads from backrest element.
New element
Cut leads as close as possible to connector.
Attach new pin, P/N 965824-6.
High-output element:
Fit new insulating sleeve, P/N 949583-9.
NOTE:
Sleeve may be attached to either pin.
Install new element and reconnect leads as before.
Normal-output element:
Cut leads as close as possible to element, leaving element in position. Install new element over original and reconnect leads (polarity unimportant).
Reassembly:
Replace upholstery and fit new clamps.
Reinstall
- lumbar Support guide and adjusting knob
- adjuster covers on both sides
- backrest adjuster
Normal-output element
Replace thermostat with new component, P/N 3521779-3.
Reinstall:
- seat cushion (ensuring upholstery rail is facing correctly)
- storage pocket at side of seat
Heating element in front seat cushion, replacement
Remove
- storage pocket
Removal
Remove upholstery rails and seat cushion.
High-output element
Disconnect single-pole connector (SB)
Disconnect three-pole connector arc push out black (SB) lead.
Normal-output element
Disconnect four-pole connector.
Push out round pins on seat cushion element leads.
Release clamps on either side
Pull off upholstery.
High-output element
Remove original heating element by releasing securing clamps.
Normal-output element
Cut leads as close as possible to element. Leave original element in position.
New element
Normal-output element
Cut leads as close as possible to connector.
Fit new pin, P/N 965824-6.
High-output element
Cut leads as close as possible to connector.
Fit new pins, P/N 965824-6 to red (R) and yellow-black (Y-SB) leads.
Fit pin, P/N 965822-0 to black (SB) lead.
Fit insulating sleeve, P/N 949584-7, to black (SB) lead.
High-output element
Transfer three-pole connector from original to new element.
Normal-output element
Transfer four-pole connector from original to new element.
Reassembly
Install new heating element
High-output element
Commence by securing element with adhesive tape. Stretch out element and fit clamps at appropriate points.
Normal-output element
Install new over original element.
Replace and secure upholstery with new clamps
Replace seat cushion
Reconnect leads. Ensure upholstery rails are facing correctly.
During the New Car Warranty period, repairs required due to defects in workmanship or material only must be submitted under:
Operation # Labor Description Time Allowance
852713 Cushion heater pad, replace-left 0.9 hr.
852714 Cushion heater pad, replace-right 0.9 hr.
852723 Backrest heater pad, replace-left 0.9 hr.
852724 Backrest heater pad, replace-right 0.9 hr.