Question 1

Why are my fans running at 100% as soon as the ignition is turned on?

Accepted Answer

The engine control module (ECM) may not have been updated after installation. The fan control setting must be changed to enable the new fan control system. If the ECM has not been programmed, the fans may default to full-speed operation.

Question 2

Do I need to reprogram the ECM after installation?

Accepted Answer

Yes. ECM programming is required after installation. The fan control setting must be updated before normal fan operation can occur.

Question 3

Where should the fan controller wiring connect?

Accepted Answer

Wire ColorConnectionGreenBus barSingle BlackGroundDouble BlackTwist together if auxiliary switch is not usedRedIgnition 12VPurpleECM fan controlTemperature ProbeRadiator

Question 4

Why are my fans not operating after installation?

Accepted Answer

Check the following:Verify all fuses are installed.Confirm battery power connections are secure.Verify all grounds are properly connected.Confirm ignition power is supplied to the controller.Check that fan wiring connections match the installation instructions.Verify the temperature sensor is installed correctly.

Question 5

Why do the fans turn on but not adjust speed?

Accepted Answer

The fan controller relies on temperature input and signal wiring to adjust fan speed. Verify:The temperature sensor is properly installed.The signal wire is connected correctly.The controller has proper power and ground connections.The electrical signal connection between the fans and controller is secure.

Question 6

Why are the fans cycling on and off frequently?

Accepted Answer

Frequent cycling may occur if:The temperature setting is too low.The temperature sensor is positioned incorrectly.Airflow through the radiator is restricted.The cooling system is operating near the controller’s activation temperature.The recommended controller setting is approximately 190°F.

Question 7

Why is the engine running hotter than expected after installation?

Accepted Answer

Verify:Fan direction is correct.Fans are mounted securely against the shroud.Wiring connections are correct.The controller is receiving accurate temperature information.The cooling system is properly filled and free of air pockets.

Question 8

Why are my electrical connections overheating?

Accepted Answer

Possible causes include:Loose electrical connections.Incorrect wire termination.Poor grounding.Damaged wiring insulation.Improper fuse installation.Inspect all connections and tighten as required.

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