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 6, Ignition Switch & Starting Circuit Check


1. Disconnect neutral safety switch (ATX), or interlock switch (MTX) connector.
2. Turn ignition switch to the Start position, then using a suitable volt-ohmmeter, check for continuity at the MTX or ATX connector.
3. If voltage reading is present, proceed to Test 7.
4. If voltage reading is not present, replace neutral safety switch, interlock switch or ignition switch as needed.