Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Brake Signal: Testing and Inspection

Inspection Of Voltage
1. Turn the ignition switch to ON.




2. Measure voltage at the brake switch connector.




3. If not as specified, check the wiring harness (Stop fuse to Brake switch, Brake switch to Powertrain Control Module) and the continuity of the switch.

Inspection Of Continuity
1. Disconnect the negative battery cable.
2. Disconnect the brake switch connector.




3. Check continuity between terminals A and B of the switch.




4. If not as specified, replace the brake switch.
5. Connect the brake switch connector.
6. Connect the negative battery cable.