Derale Performance Adjustable Electric Fan Controller, 3__8" NPT Thread In Probe - Manual (Page 2)

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.
TEMPERATURE ADJUSTMENT
VEHICLE TESTING
DO NOT ADJUST TEMPERATURE UNTIL AFTER
VEHICLE IS RUNNING!
WARNING:
(See Diagram #1)
Refer to the VEHICLE TESTING section.
Adjustment range is only 3/4 turn total rotation.
Do not force past the stop or all warranty is void!
1. Remove the Rubber Adjustment Plug on the Control
Module.
2. Turn adjustment screw counter clockwise to lower the
fan turn-on temperature.
3. Turn adjustment screw clockwise to raise the fan
turn-on temperature.
4. Replace the Rubber Adjustment Plug.
1. Before you start the vehicle, make sure all wires are
safely zip tied and away from any moving parts.
Note:
Green Wire: Override Circuit (Optional)
If the yellow wire is connected to a constant power source (battery) the electric fan will run after the vehicle is shut off
and could run down the battery.
The green wire is designed to work in two different configurations. When used, this will allow the fan(s) 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) with a positive feed.
For Manual Switch installation always follow manufactures instructions.
2. Start the vehicle.
3. If the Manual Override function is being used either turn on the air conditioning of the vehicle or flip the Manual Switch
on. The electric fan should start running immediately.
4. Turn off the Manual Override function and allow the engine to warm up to operating temperature.
5. If the electric fan has not turned on, take a Screw Driver and turn the Adjustment Screw counter clockwise in small
increments until fan starts.
6. Allow the electric fan to run and shut off automatically, and possibly cycle on again. If the electric fan turns on too
early, turn the Adjustment Screw clockwise.
7. Once you have the fan cycling on and off using the control module, take the vehicle for a short test drive. For personal
preference, some adjusting may still be necessary.
8. Make sure the Rubber Adjustment Plug is securely in place.
Q: Why doesn’t the fan turn on automatically?
A: 1. Check all connectors to make sure contacts are crimped correctly.
2. Check the Ground connection to make sure all paint is sanded off and you are getting a metal to metal contact.
3. Using a 12V Test Light, check to make sure the fan has power on the Positive (+) fan lead even when the vehicle is off.
Q: Why does the fan run after the engine is turned off?
A: Check the Yellow Wire, this wire should be connected to a switched ignition source.
Q: Why doesn’t the electric fan turn on when I turn on the A/C or Manual Switch?
A: To quickly test the Manual Override Circuit, disconnect the Green wire and run a jumper wire directly to the Positive (+)
terminal on the battery. Electric fan should start immediately. If fan started reattach the Green wire to the proper (+) wire
on the A/C clutch or Manual Switch.
TROUBLE SHOOTING Q&A
Diagram #3
Relay
Red
Yellow
Black
Green
To (+) 12V Switched Ignition
To
Ground (-) Chassis
Override Circuit
Loose “Red” Wire
Positive (+) Battery
Negative (-) Fan Wire
Fan
+
30 Amp Fuse