Parking Brake Switch Circuit

NAVIGATION: NAVIGATION SYSTEM (for CrewMax): Parking Brake Switch Circuit

Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake switch to the navigation receiver.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BRAKE WARNING SWITCH
(a) Check that the brake warning switch lights come on when the parking brake is applied and goes off when it is released.
OK:
The brake warning lights operate as specified above.
OK -- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - PARKING BRAKE SWITCH)
NG -- Continue to next step.
2. INSPECT PARKING BRAKE SWITCH





(a) Disconnect the A5 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE PARKING BRAKE SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - PARKING BRAKE SWITCH)





(a) Disconnect the K6 receiver connector.
(b) Disconnect the A5 switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE