Derale Performance High Output Dual Rad Fan Assembly - Manual (Page 4)

Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
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.
1. A/C Override – Using the Blue Wire Tap provided, attach the Green Wire to the Positive (+) lead on the air conditioning
compressor.
2. Manual Switch Override – Attach the Green Wire to the manual switch. NOT PROVIDED (See Diagram #10 on page 4)
For Manual Switch installation, always follow manufacturer’s instructions.
Using the Blue 5/16” Ring Terminal provided, attach the Red wire directly to the vehicles Positive (+) battery
terminal.
Using the Blue Female Connector provided, attach the Yellow Wire to EITHER terminal on the 190° Thermostat
Switch.
Using the Blue Female Connector, Blue Wire Tap Connector and Wire provided, attach the remaining
Thermostat Switch Lead to a Positive (+) switched ignition source.
If the Yellow Wire is connected to a constant power source (battery) the electric fan will run after the vehicle has been
shut off and could run down the battery.
See Electric Fan Wiring
The Green Wire is designed to work in two different
configurations. When used, this will allow the fan to be
turned on regardless of the temperature of the thermostat
as it simply overrides all other functions. If you choose to
not use this option, cut any exposed copper and tape or
shrink wrap the end of the wire.
1. A/C Override – Using the Blue Wire Tap provided,
attach the Green Wire to the Positive (+) lead on the air
conditioning compressor.
2. Manual Switch Override – Attach the Green Wire to the
manual switch NOT PROVIDED (See Diagram #10)
For Manual Switch installation, always follow
manufacturer’s instruction
Reattach the Negative (-) terminal on the vehicles battery.
RELAY #2
Red Wire -
Yellow Wire -
Thermostat Switch -
Note:
Orange Wire -
Green Wire - Override Circuit (Optional)
(Wiring Continued)
TROUBLE SHOOTING Q&A
Q: Why is the fan(s) blowing in the wrong direction?
A: Switch the Positive (+) and Negative (-) fan leads. This will reverse the airflow direction.
Q: Why doesn’t the fan(s) turn on?
A: 1. Check all connections to make sure all contacts are crimped correctly.
2. Check all Ground (-) connections to make sure all paint is sanded off and you are getting a metal to metal contact.
Q: Why does the fan(s) run after the engine is turned off?
A: Check the wire going to the Thermostat Switch, this wire should be connected to a 12V Positive (+) switched ignition source.
Q: Why doesn’t the fan(s) turn on when I use the Override function?
A: To quickly test the Override circuit, disconnect the Green Wire and run a jumper wire directly to the Positive (+) terminal on
the battery. The electric fan should start immediately. If fan started, reattach the Green Wire to the proper (+) wire on the A/C
clutch or Manual Switch.
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 Override function is being used, either turn on the vehicles air conditioning or flip the manual switch to the ON
position. The Electric Fan should start immediately.
4. Turn off the Override function and allow the engine to warm up to operating temperature.
5. Fan #1 should start around 180°F.
6. Fan #2 should start at 190°F.
Diagram #10
For manual switch wiring, refer to
switch manufacturer instructions.
15Amp Fuse
+12V
Ignition Power
Green Wire
Manual Switch Override Instructions
(Switch Not Included)
(Page 4)