Testing the Parking Brake Switch
1. Park the machine on a level surface, lower any attachments to the ground,
engage the parking brake, and remove the key from the ignition.
2. Chock the wheel to prevent the machine from rolling.
3. Switch the main circuit breaker to the O
FF position, to de-energize the electrical
system.
4. Raise the hood and locate the parking brake switch wiring harness connection to
the left of the hydraulic oil tank.
5. Disconnect the wire harness connector from the switch.
Note: The blue wire from the switch is not functional. The wire is not connected and
therefore not part of the circuit.
6. Use a multimeter (ohms setting) to determine whether continuity exists between
the terminals for the switch when the parking brake is engaged and disengaged.
7. Replace the switch if necessary.
8. If the switch tests correctly and a circuit problem still exists, check the wire
harnesses; refer to 9 Appendix A, page 9–1
9. Connect the wire harness and close the hood.
10. Switch the main circuit breaker to the O
N position, to energize the electrical
system.
4520P Page 6–39 Electrical System: Parking Brake Switch
09.40003Rev 00
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