Seats: Description and Operation

CIRCUIT OPERATION
The power seat system is protected by a 20 Amp circuit breaker located in cavity 18 of the junction block. This circuit breaker is HOT at all times. Circuit A3 is the power supply for the circuit breaker.

The A3 circuit originates in the Power Distribution Center (PDC) and is protected by a 40 Amp fuse located in cavity 15. This circuit is also the feed for the Daytime Running Lamps Headlamp Relay and Power Door Locks.

Circuit F35 is the feed for the switch and the seat motors from the circuit breaker A BUS bar internal to the switch feeds all the contacts. Grounding for the seat is provided on the Z1 circuit.

When the operator selects the FRONT VERTICAL UP function power is passed on the F35 circuit through the CLOSED contacts in the switch to the P19 circuit. The P19 circuit connects to the motor. Ground is provided on the P21 circuit back to the switch. A ground BUS bar internal to the switch then connects to the Z1 circuit.

For FRONT VERTICAL DOWN function the circuits are reversed. P21 is the feed and P19 is the ground.

When the operator selects the HORIZONTAL FORWARD function power is passed on the F35 circuit through the CLOSED contacts in the switch to the P19 circuit. The P19 circuit connects to the motor. Ground is provided on the P17 circuit back to the switch. A ground BUS bar internal to the switch then connects to the Z1 circuit.

For HORIZONTAL REARWARD function the circuits are reversed. P17 is the feed and P15 is the ground.

When the operator selects the REAR VERTICAL UP function power is passed on the F35 circuit through the CLOSED contacts in the switch to the P11 circuit. The P11 circuit connects to the motor. Ground is provided on the P13 circuit back to the switch. A ground BUS bar internal to the switch then connects to the Z1 circuit.

For REAR VERTICAL DOWN function the circuits are reversed. P13 is the feed and P11 is the ground.