How to Wire Brush Style vs. Brushless Fans for Muscle Car Applications at Prestige Motorsports

How to Wire Brush Style vs. Brushless Fans for Muscle Car Applications at Prestige Motorsports

Prestige Motorsports President, Doug Aitken, takes some time to explain our process in wiring brush style and brushless fans. We do things a bit different here at Prestige to ensure we can properly cool the engines that we build in your ride.

Stay tuned to the end for the detailed diagrams on each style of fan which we include in a usb card among many other tech items for you when you purchase a tailor-made engine from Prestige Motorsports.

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[terryhatfieldmin]

Thanks so much Doug! This is exactly what I needed!

[RadDadisRad]

Industrial controls and automation electrician here, I agree with this wiring. External ground strap needs to be as close as possible to your coolant temp switch. If not you’ll get a lot of electrolysis through the radiator.

[farisbsoul]

Let me correct you. The brushless fan have constant power even if the ignition switched off, and the ground connected to chassis as well. White wire is the PWM signal. Brushless fans don't turn on unless it receives the PWM signal "pulse signal", this is controlled by the ECU. In your diagram you refered to ECU as a smart sensor, which in fact, the temp sensor connected to ECU, and based on temps, ECU send pulses to the brushless fan to start. The fan speed depends on the signal frequency that the ECU send to the built-in brushless fan driver. If there's smart sensors, have already a built-in PWM controller, then it'll send the signal to the fan as per what were programed for based on the temps. But you can't just connect the brushless fan directly to positive and negative and expecting to turn on. Without the PWM signal, it wont work.

[RadDadisRad]

I also like your brushed wiring layout. If you’re using a 5 pin relay I like to wire my power to 85(A1) and 87(NO). If you use 30(common) if the switch is off terminal 87a(NC) will be hot. If you use 87(NO) as your constant power source instead of 30(common) when the switch is off 87a(NC) won’t be hot.

[mikelangieri]

I love these kind of videos where you explaining each step of your diagram. But are you saying on the brushless diagram, that red wire coming from the smart sensor goes to a 12v keyed ignition source but doesn't connect to the battery + side? It sounded like you said that but you didn't erase that line. The way the video ended it kinda looks like 12v is still going direct to the place where you wrote "XO". One other question... can the Smart Sensor control two (2) brushless fans, and would it soft start one or both?