519 Telehandler ELECTRICAL

Park Brake Circuit Tests

Step 22

Check the park brake fuse (#2) (1) and test for power to the fuse, refer to (Step 4). Check the ignition relay power (2), refer to (Steps 5 and 6).

If there is 12 to 13 volts at the park brake fuse, proceed to the next step.

Step 23

Remove the park brake relay. Connect the positive (+) test lead to the right side terminal (#3) of the park brake relay socket (relay terminal 30). Turn the key switch to the ON position.

If there is no voltage, repair or replace the wiring between the fuse and the relay.

If there is 12 to 13 volts, proceed to the next step.

Step 24

Connect the positive (+) test lead to the bottom terminal (#2) of the relay socket (relay terminal 85). With the key switch and park brake switch in the ON position, the multimeter should read 12 to 13 volts.

If there is no voltage, proceed to Step 30.

If there is 12 to 13 volts, proceed to the next step.

Step 25

Move the park brake switch to the OFF position. The multimeter should read 0 volts.

If there is no voltage, proceed to the next step. If there is 12 to 13 volts, proceed to Step 28.

Step 26

Step 28

Install park brake relay. Connect the positive (+) test lead and the negative (-) test lead to the park brake solenoid valve wire harness as shown. With the key switch in the ON position and the park brake switch in the OFF position, the multimeter should read 12 to 13 volts.

If there is no voltage, replace the park brake relay.

If there is 12 to 13 volts, and the park brake will not release, test the park brake hydraulic circuit before replacing the park brake solenoid valve.

Step 27

See Step 13 for instructions to remove the instrument panel to gain access to the park brake switch.

Step 29

Move the park brake switch to the ON position. The multimeter should read 0 volts.

If there is no voltage and the park brake will not apply, replace the park brake solenoid.

If there is 12 to 13 volts, proceed to the next step.

Connect the positive (+) test lead to the #2 terminal (brown/yellow wire) of the park brake switch. With the key switch in the ON position, the multimeter should read 12 to 13 volts.

If there is no voltage, repair or replace the wire between the switch and the park brake fuse. If there is 12 to 13 volts, proceed to the next step.

Template Name: OML_2_col907871E Template Date: 1997_02_12