Power Top
CIRCUIT OPERATIONThe power top system uses a switch, a hydraulic pump motor, and two relays.
Power for the switch is supplied on circuit F20. This circuit is HOT when the ignition switch is in the RUN position and is protected by a 15 Amp fuse located in cavity 4 of the junction block.
Circuit A22 is connected between the ignition switch and the fuse. Power for the A22 circuit is supplied by circuit A2. This circuit originates in the Power Distribution Center (PDC) and is protected by a 40 Amp fuse located in cavity 18.
Ground for the switch is supplied on circuit Z1. This circuit terminates at the instrument panel left side cowl.
The switch has a Light Emitting Diode (LED) for night illumination. The LED is powered by the F20 circuit.
Down Operation
When the operator selects top DOWN, circuit F20 is connected to circuit P5. The P5 circuit connects from the switch to the power top DOWN relay Voltage flowing through the coil side of the relay causes the contacts in the relay to CLOSE connecting circuits A25 and P4.
The A25 circuit is protected by a 40 Amp fuse located in cavity 11 of the PDC.
Circuit P4 connects from the relay to the pump motor. Voltage flows through the motor to circuit P3. The P3 circuit provides the ground path for the motor back to the relay assembly. Internal to the relay circuit P3 connects to circuit Z1. The Z1 ground circuit terminates at the instrument panel left side cowl.
Up Operation
When the operator selects top UP, circuit F20 is connected to circuit P6. The P6 circuit connects from the switch to the power top UP relay. Voltage flowing through the coil side of the relay causes the contacts in the relay to CLOSE connecting circuits A25 and P3.
The A25 circuit is protected by a 40 Amp fuse located in cavity 11 of the PDC.
Circuit P3 connects from the relay to the pump motor. Voltage flows through the motor to circuit P4. The P4 circuit provides the ground path for the motor back to the relay assembly Internal to the relay circuit P4 connects to circuit Z1. The Z1 ground circuit terminates at the instrument panel left side cowl.