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)
Or, hide this message:
temporarily or
permanently
Main Relay (Computer/Fuel System): Description and Operation
PURPOSE The Main Relay provides power to the
Engine Control Module (ECM) and to the coil of the
Circuit Opening Relay.
OPERATION Turning the Ignition Switch to ON causes the contacts inside the relay to connect allowing current to flow from the 15 amp EFI fuse to the ECM and the
Circuit Opening Relay.