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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Main Relay (Computer/Fuel System): Description and Operation
PURPOSE Supplies power to the
engine control module (ECM) and a number of ECM controlled output devices.
OPERATION The main relay, (when energized) supplies power to the ECM,
fuel pump relay, distributor, fuel injectors, and a variety of solenoid valves.