Green Wire: Override Circuit (Optional)
The green wire is designed to work in two different configurations. When used, this will allow the electric fan(s) to be turned on
regardless of the temperature of the cooling system. The fan speed will quickly ramp up to 60% and will operate between 60
and 100% as temperature increases and decreases.
Connect the Green wire to either option A or B below.
Note:
Use of the Override is optional and not required for the PWM controller to work properly.
A. A/C Override - Using the
provided, attach the green wire to a positive (+) 12V output on the
blue wire tap connector
A/C
High Pressure Switch.
B. Manual Switch Override - Attach the green wire to the 12V output on the manual switch (not provided.)
VEHICLE TESTING
1. Before you start the vehicle, make sure all wires are safely zip tied and away from any moving parts.
2. Start the vehicle.
3. If the manual override function is being used, turn on the A/C or manual switch. Electric fan(s) will ramp up to 60%.
4. Turn off the manual override or A/C function and allow the engine to warm up, fans will ramp up slowly as the vehicle warms up.
(Page 3)
ADJUSTING THE TURN-ON TEMPERATURE
The PWM Controller is factory set at approximately 180°F. Therefore Fans will adjust
speed to maintain 180°F fluid temperature. Using the adjustment screw on side of the
controller the temperature can be adjusted to maintain fluid temperatures from
130°F - 230°F. Follow the directions below to make adjustments to the temperature.
1. Remove the rubber plug from the side of the fan controller
2. Using a 1/8” blade screwdriver, follow the instructions below:
If your engine is running too cool:
Turn the adjustment screw CLOCKWISE in
increments of 2 FULL turns, then test before
repeating.
If your engine is running too hot:
Turn the adjustment screw COUNTER-CLOCKWISE in
increments of 2 FULL turns, then test before repeating.
Please direct all technical questions to our Derale tech line at (323) 266-3850
Warning:
Installation of accessories should only be undertaken by those with mechanical knowledge and are familiar with working on
vehicles. Always use eye protection (goggles, safety glasses or shield). Park the vehicle in a well lit area, on level ground and apply the
parking brake. Only work on a cold vehicle that has been sitting overnight, failure to do so will result in severe burns and injury. Before starting
the vehicle, make sure no tools or any other items are left under hood that could interfere with or be drawn into moving parts of the engine.
Failure to follow instructions can lead to severe damage and personal injury.
Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
Derale Performance, Los Angeles, CA 323.266.3850 www.derale.com
WIRE COLOR QUICK REFERENCE GUIDE
Red Wire:
Battery Positive (+)
Black Wire:
Battery Negative (-)
Blue Wire:
Fan Positive (-)
Yellow Wire:
Positive (+) Switched Ignition Source
Green Wire:
A/C Override or Manual Override 12V Positive (+)
Diagram #2
