Automotive Electrical and Electronic Systems Classroom Manual Fifth Edition Update by John F. Kershaw

Body Accessory Systems Operation 331
armatures in one housing (Figure 15-28). The
control switches have two two-position knobs
that control edge tilt and a four-position knob that
controls forward, backward, up and down seat
movement. The switch contacts shift the current
to different motor brushes to control motor reversal.
The permanent-magnet motors are grounded
through the switch and may contain an internal
circuit breaker.
Figure 15-28. Chrysler, Ford, and late-model GM sixway
power seat systems use three reversible motor
armatures in one housing. (DaimlerChrysler Corporation)
HEATED SEATS
Most manufacturers of premium cars and SUVs
offer heated front seats, and in some cases back
seats as well (Figure 15-29). Most vehicle heated
seat systems consist of four heated seats: two in the
front and two in the rear. Figure 15-30 shows a typical
heated seat system schematic. Most heated seat
systems consist of the following components:
• Heated seat module or controller
• Heated seat switch
• Seat back heating element
• Seat cushion heating element
The rear integration module (RIM), driver
door module (DDM), left rear door module
2
3
4
1
(1) Heated Seat Switch - Driver
(2) Heated Seat Switch - Front Passenger
(3) Console Trim Plate
(4) Traction Control Switch
Figure 15-29.
Heated seat controls. (GM Service and Parts Operations)