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

Tests 1 - 4:





SYMPTOM
CHECKING BRAKE SWITCH OPERATION WITH NO DTC'S

POSSIBLE CAUSES
- DRB does not show brake switch pressed or released
- Brake lamp switch output less than 10.0 volts
- Fused B(+) circuit open
- S/C brake switch output less than 10 volts at brake switch