Circuit/System Description

Battery voltage is supplied at all times to the passenger seat adjuster switch through a 30 A fuse located in the underhood fuse block. When the seat switches are in an inactive state, the switch contacts are closed to the switch ground circuit. The seat vertical and recline motors are completely controlled through their respective seat adjuster switches. However, the seat horizontal motor is controlled through the driver seat memory control module.

Seat Vertical and Recline Motors 

All seat motors are reversible. For example, when the seat vertical up switch is pressed to move the entire seat up, battery voltage is applied through the switch contacts and the seat vertical motor up control circuit to the motor. With the seat vertical motor down switch contacts closed to the switch ground circuit, the motor runs in order to move the entire seat up until the switch is released. Lowering the entire seat works similarly to moving the entire seat up, except that battery voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction. All seat motors, except the seat horizontal motor, are powered this way.

Seat Horizontal Motor 

When the passenger seat horizontal switch is pressed to move the entire seat forward, battery voltage is applied through the switch signal circuit to the seat memory control module indicating the entire seat forward command. In response to this signal, the seat memory control module applies battery voltage through the passenger seat horizontal motor forward control circuit and ground through the passenger seat horizontal motor rearward control circuit to the motor. The motor runs to drive the entire seat forward until the switch is released. Moving the entire seat rearward works similarly to moving the entire seat forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction.