Cooling Fans
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The cooling fans are controlled by four relays to provide three speeds. If DTC P1474, P1477 or P1479 are present, refer to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE for diagnosis.
In HIGH speed, the cooling fans are wired parallel and the following relays are grounded by the PCM:
- Fan braking relay.
- Engine cooling fan relay.
In MEDIUM speed, the cooling fans are wired parallel through a resistor and the following relays are grounded by the PCM:
- Fan braking relay.
In LOW speed, the cooling fans are wired in series and the following relays are grounded by the PCM:
- Fan braking relay.
- Engine cooling fan relay.
- HEDF and EDF relay.