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

Regular Method

TEST # 1 (Regular Method)

CHECK FOR 12 VOLTS TO TERMINAL -A- AT TRANSMISSION

^ Check for 12 volts to terminal A at the transmission.

^ Raise the vehicle on the lift so the driving wheels are off the ground.




^ Connect the alligator clip of your test light to ground. Unplug the wires at the case and place the tip of your test light on the terminal marked A.

^ Do not depress the brake pedal.

^ Computer controlled vehicles: turn on the ignition and the tester should light.

^ All other vehicles: start the engine and bring to normal operating temperature.

^ Raise RPM to 1500 and the tester should light. If tester lights continue with Regular Method.

^ If the tester does not light go to Test # 2.