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)

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Test D

1. If measurement was less than 30 ohms, proceed to test J. Otherwise, remove connector from cruise control servo and measure resistance between terminals A and C of servo.
2. If resistance is greater than 55 ohms, replace cruise control servo.
3. If resistance is less than 55 ohms, check for open in dark blue/white wire (circuit 403, Lumina) or dark blue wire (circuit 403, Grand Prix and Regal) or light/green wire between terminal C of cruise control module and terminal A of cruise control servo. Ensure terminal C of cruise control servo connector is grounded.