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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Glow Plug: Testing and Inspection

If the system does not operate as described in "Circuit Operation," perform the Glow Plug System Check. It provides a fast way to determine if the glow plug system is working properly. Use this procedure, whenever there is doubt about correct system operation. Refer to C Charts/Computers and Control Systems. Testing and Inspection

CAUTION: Do not manually bypass the glow plug relay. Do not jump start with more than a 12 volt system. The glow plugs could be damaged.