For 1990-2009 cars only
There are 3 reversible motors operating the power seats:
| • | The Forward/Back Motor |
| The forward/back motor moves the entire seat forward and back. |
| • | The front height motor |
| The front height motor tilts the front of seat. |
| • | The rear height motor |
| The rear height motor tilts the rear of the seat. |
| • | The front and rear height motors can be operated at the same time. |
| When the middle of the power seat switch is moved up or down, the front and rear height motors move the entire seat up and down. |
Motor Operation
| • | All circuits leading to all three motors are grounded at all times from G305. When the forward position on the power seat switch is pressed, voltage is supplied from the DEFOG/SEATS Circuit Breaker 12 through circuit 1240, the power seat switch forward position, circuit 285 to the forward/back motor. The motor is grounded from G305, circuit 1450, the power seat switch, and circuit 284. This drives the motor forward. When the back position is pressed on the power seat switch, voltage is now applied through circuit 284 and ground is provided through circuit 285. This reversed polarity causes the motor to run in the opposite direction. Operation of the individual front and rear heights operate identical to that of the forward/back motor. |
| • | The front and rear heights can be operated at the same time through the power seat switch. When the middle of the power seat switch is pressed to the up position, voltage is supplied from the DEFOG/SEATS Circuit Breaker 12 through circuit 1240, the power seat switch, circuits 282 and 286 to both motors. Both motors are grounded from G305, circuit 1450, the power seat switch and circuits 283 and 287. This drives both motors. The down position has identical operation to the up position except for reversing power and ground. |
Electronic Circuit Breaker (ECB)
| • | Each motor contains an Electronic Circuit Breaker (ECB). |
| • | When the motor is overloaded the ECB resistance increases until opening. |
| • | When the overload is removed the ECB closes and resistance returns to normal. |
