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

Shift Light: Description and Operation

Manual Transmission Shift Light:






The purpose of the shift light is to provide a display to indicate the optimum fuel economy point for upshifting the manual transmission based on engine speed and load. The display is a lamp on the instrument panel. Activation of the ECM lamp driver will turn the Shift Light "ON."