Seats: Description and Operation

POWER SEAT SYSTEM
The power seat system option allows the driver (or passenger on SLT Plus with power seats) to electrically adjust the seat position for optimum control and comfort using the power seat switches located on the outboard seat cushion side shield. The power seat system allows the seating position to be adjusted forward, rearward, front up, front down, rear up, or rear down. The power seat system receives battery current through a fuse in the Power Distribution Center and a circuit breaker in the junction block, regardless of the ignition switch position.

The quad cab models equipped with the power seat option also feature a power operated lumbar support in the seat back. The power lumbar support allows the user to inflate or deflate a bladder located in the lower seat back to achieve optimum comfort and support in the lower lumbar region of the spinal column. The power lumbar support shares the battery feed circuit of the power seat system.

The power seat system includes the power seat adjuster and motors unit, the power lumbar support bladder and electric pump (quad cab only), the power seat switch, and the circuit breaker. Following are general descriptions of the major components in the power seat system. Refer to Heated Seat System for information on the individually controlled heated front seats. Refer to the owner's manual in the vehicle glove box for more information on the features, use and operation of the power seat system.

The power seat system allows the driver and/or front passenger seating positions to be adjusted electrically and independently using the separate power seat switches found on the outboard seat cushion side shield of each front seat. See the owner's manual in the vehicle glove box for more information on the features, use and operation of the power seat system.

HEATED SEAT SYSTEM
Individually controlled electrically heated front seats are available factory-installed optional equipment on the Ram quad cab models that are also equipped with the optional SLT Plus (leather) trim package. Vehicles with this option can be visually identified by the two separate heated seat switches mounted in a bezel located in the lower right corner of the instrument cluster bezel, next to the radio receiver. The heated seat system allows the front seat driver and passenger to select from two different levels of supplemental electrical seat heating, or no seat heating to suit their individual comfort requirements. The heated seat system for this vehicle includes the following major components, which are described in further detail later in this section:

Heated Seat Switches - Two heated seat switches are used per vehicle, including two Light-Emitting Diode (LED) indicator lamps and an incandescent back lighting bulb for each switch. One switch for the driver and one for the passenger front seats. The switches are mounted in the instrument panel, next to the radio.

Heated Seat Module - also referred to as the Seat Heat Interface Module (SHIM), this module contains the solid state electronic control and diagnostic logic circuitry for the heated seat system. One heated seat module is used per vehicle and is mounted under the center front seat cushion.

Heated Seat Elements - Four heated seat elements are used per vehicle, one for each front seat back and one for each front seat cushion. The elements are integral to the individual front seat and seat back cushions and cannot be removed once installed at the factory. Service replacement seat heating elements are available, without having to replace the entire seat cushion or trim cover.

Heated Seat Sensors - Two heated seat sensors are used per vehicle, one for each front seat. The sensors are integral to the individual front seat heating elements and cannot be removed once installed at the factory.

Heated Seat Relay - The heated seat relay controls the battery voltage and current supply to the heated seat module and the rest of the heated seat system. The heated seat relay is mounted in the junction block and is not different than the other relays used throughout the vehicle. Refer to the Power Distribution section for more information on standard ISO relays.