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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Ignition Control Module: Testing and Inspection

- Disconnect left-hand four-pin plug from EZ control unit.

EZ Control Unit (Left 4-Pin Plug):





- Connect voltmeter to terminal 15 (+) and terminal 31 (-) of plug.
- Turn ignition ON. Should be battery voltage.
- If no voltage displayed, trace fault with wiring diagram.

Note: Terminal 15 is switched across ignition system relay and should remain activated for 3 - 7 seconds.