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6
Operation
(continued)
Mounting
The SPAL FAN-PWM is water resistant and can be mounted in the engine bay or
inside the vehicle. Keep the controller away from high heat sources such as the
engine exhaust. Above the wheel well, on the radiator support, or rewall are
good examples of proper locations.
When the ‘FAN’ LED lights RED, a negative output will be sent on the gray wire.
This gray wire can be used to trigger a fan relay, an indicator light, etc. If you are
using dual fans with the recommended wiring setup (refer to pages 18/19) your
2nd fan will turn on full speed at this time.
If the cooling system is able to lower the coolant temperature approximately 5°
below the High setting, the ‘FAN’ LED will turn from RED to AMBER and the fan
will slow in speed; at this time the second fan output will stop as well. If the cool-
ing system is able to continue to lower the coolant temperature to approximately
5° degrees below the low setting, the ‘FAN’ LED will turn off, the ‘STAT’ LED will
light GREEN, and the fan will stop completely.
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