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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Ground Test

Fig. 2 Ground test:






1. Turn ignition switch to OFF position.
2. Connect a suitable ohmmeter from control module support mount to battery ground terminal, Fig. 2.
3. Ohmmeter should indicate .2 ohms or less.
4. If ohmmeter indicates more than .2 ohms, check for faulty support, mounting and battery ground connections. Also check that the control module casing is clean and mounting nuts and/or bolts are clean and tight.