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)

Or, hide this message: temporarily or permanently

Checking Brake Switch Sense

Tests 1 - 4:




Tests 5 - 7:





SYMPTOM
BRAKE SWITCH SENSE

POSSIBLE CAUSES
- Ground circuit open
- PCM connector terminal observable defect
- Brake switch defective
- Brake switch sense circuit open
- Brake switch sense circuit shorted to ground
- PCM defective (brake switch sense)