Operation CHARM: Car repair manuals for everyone.
Home >> Honda >> 2005 >> Civic Si L4-2.0L >> Repair and Diagnosis >> Heating and Air Conditioning >> Description and Operation >> How the Circuit Works >> Fans
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

Fans

Fans

How the Circuit Works

Voltage is provided at all times to the radiator fan relay contacts through fuse 4 and to the A/C condenser fan relay contacts through fuse 1. With the ignition switch ON (II), voltage is provided to the coils of the relays through fuse 14 (in the under-dash fuse/relay box).

The relays are grounded by either the radiator fan switch or by the ECM. Grounding the relays energizes their coils and applies battery voltage to the radiator and condenser fan motors. Both fans then run until ground is removed from the relay coils.
pro multis · About Operation CHARM