Three Speed Fan Operation
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Although the PCM output circuits are called low, medium and high fan control (FC), cooling fan operation is controlled by a combination of these outputs.
Refer to ENGINE CONTROL COMPONENTS .
NOTE:
The VPWR and LFC circuits may be reversed in the harness connector. Also, the LFC circuit may be wired to two separate relays. Refer to the appropriate System Wiring Diagram article
for additional information.
NOTE:
The VPWR and MFC circuits may be reversed in the harness connector. Also, the MFC circuit may be wired to two separate relays. Refer to the
for additional information.
NOTE:
The VPWR and HFC circuits may be reversed in the harness connector. Also, the HFC circuit may be wired to two separate relays. Refer to the appropriate SYSTEM WIRING DIAGRAMS article
for additional information.
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR
| Vehicle | Pin | Circuit |
|---|---|---|
| Mustang | E4 E7 |
HFC LFC |
| Ranger | E7 | LFC |
| All other vehicles | B18 B34 |
HFC LFC |