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

Test F: The Speed Control Indicator Lamp Is Always On

PINPOINT TEST F: THE SPEED CONTROL INDICATOR LAMP IS ALWAYS ON


F1-F2:






F2-F3:






Normal Operation
Voltage is supplied by the smart junction box (SJB) through circuit 640 (RD/YE) to the instrument cluster. The ground is supplied by the speed control actuator through circuit 203 (OG/LB). The actuator grounds circuit 203 (OG/LB) when the speed control is active.

Possible Causes
- Speed control actuator
- Circuit 203 (OG/LB) short to ground
- Instrument cluster