Installation manual

- 13 - Ford Racing Technical Support (800)FORD-788
M-12071-A50
REVISION 2
D. Optional Electric Cooling Fan Control, By default, the factory Ford computer
(PCM) has no provisions to control an electric cooling fan. However, some
aftermarket ‘chip’ tuners are able to introduce this function via pin 41 at the
PCM, which is normally an unused pin.
 If you will be using a 'chip-tuned' PCM to control an electric cooling fan, you
will need to attach the 10ga Orange wire (Page 6, Item #30) to the 12V+
side of the electric cooling fan. You will also need to provide the ground
cable for the fan, and it too should be a 10ga wire attached directly to the
chassis.
o NOTE: If the electric cooling fan being used is rated in excess of 35
amps, you should use the Orange wire to trigger an external relay
for use with that fan.
 If you will NOT
be using an electric fan, the cooling fan wire(s) can be cut
back and taped off. Additionally, if the PCM has not been modified for this
feature, be aware that there is no concern that the Orange wire will have
any voltage present, and should not be at risk of shorting out.
FRCM LAYOUT
(Schematic on page 20)