Power Seats

Power is supplied to the driver seat adjuster switch from the SEAT circuit breaker through circuit 340. There are three reversible motors that operate the power seat. The front height and rear height of the seat are operated by separate motors. Each can be raised or lowered independently of the other. When the driver seat adjuster switch is pushed in the middle to the up or down position, both motors run to move the front and rear of the seat at the same time.
The horizontal adjuster motor is also operated by the driver seat adjuster switch. When it is held in the forward position, battery voltage is applied through the switch contacts and circuit 285 to the horizontal adjuster motor. The motor is grounded through circuit 284 and the seat adjuster switch through circuit 750 from G301.

In the back position, circuit 284 receives battery voltage and circuit 285 is grounded. This reversed polarity causes the motor to run in the opposite direction and drive the seat backward.

The front and rear vertical adjuster motors work in a similar way when the front or rear height switch is operated.

To raise the entire seat, the driver seat adjuster switch is held in the up position. This applies battery voltage through circuit 282 and circuit 286 to the rear vertical adjuster motor and front vertical adjuster motor. The motors are grounded through circuit 283 and circuit 287 and the seat adjuster switch through circuit 750 from G301. Both motors run to drive the entire seat up. A similar action occurs to move the entire seat down.

Each motor contains a solid state self-resetting circuit breaker to protect it from overload. Electronic Circuit Breaker (ECB) resistance increases if a motor is overloaded and returns to normal after voltage is removed from the motor terminals.