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

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Servo Electrical Input


1. Connect a suitable test lamp between ground and servo connector brown wire with red tracer, then turn ignition and speed control switch "On." Lamp should light. Depress set button, lamp should go out and a click should be heard at servo. Release set button, lamp should light and a click should be heard at servo.
2. If test lamp does not light as described in step 2, a blown fuse, faulty wiring, or a defective speed control switch is indicated. If click is not heard, servo is defective.
3. Connect a suitable test lamp between ground and servo connector white wire with red tracer. Turn ignition switch and speed control switch "On." Test lamp should not light. Depress set button, test lamp should light as long as set button is depressed. If test lamp does not operate as outlined, a defective speed control switch or faulty wiring is indicated.
4. Connect a suitable test lamp between ground and servo connector blue wire with red tracer. Turn ignition switch and speed control switch "On." Test lamp should light. If test lamp does not light, faulty wiring, brake switch, clutch switch or speed control switch is indicated.