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

FD92 - Check Stoplamp/BOO Circuits For Short to Power



- Key "ON", engine "OFF".

- Brake pedal NOT depressed.

- Wiggle stoplamp/Brake On/Off (BOO) circuit wires and connectors while observing stoplamps.

- Do stoplamps flash on while wiggling?

Yes -- Isolate short to power and service as necessary. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Go to FD93. FD93 - Check Stoplamp Circuit Continuity