Totalnoob Posted May 16, 2015 Report Share Posted May 16, 2015 Hey how do I wire a computer fan to the car and have it turn on and off with the amps? Do i use the remote turn on as the 12v source so the fan with turn on with the amps? The fan has red black and yellow wires on it. Link to comment Share on other sites More sharing options...
reedal Posted May 16, 2015 Report Share Posted May 16, 2015 find the model number of the fan, look up the installation manual for it to find out which wire requires what source (in case red isn't switched and yellow isn't constant and black isn't ground), and wire the switched source to amps remote turn on, constant to amps power or to battery, and ground to ground. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
gckless Posted May 16, 2015 Report Share Posted May 16, 2015 find the model number of the fan, look up the installation manual for it to find out which wire requires what source (in case red isn't switched and yellow isn't constant and black isn't ground), and wire the switched source to amps remote turn on, constant to amps power or to battery, and ground to ground. There is no switched source in computer fans. There are typically a maximum of four pins on a PWM fan (this is generally): Black: Ground Red: 12VDC+ Yellow: Tachometer signal (sense) Red: Control In OP's case, ignore the yellow wire, it's useless to you. Wire in a relay, use the remote turn-on as sense to the relay. I wouldn't use the remote turn-on as power for the fan, though some do. "Clipping" is the biggest forum boner now. It's like witchcraft... it automatically explains just about everything people don't understand. My build log: http://www.stevemeadedesigns.com/board/topic/200295-gckless-2011-chevrolet-impala/ High resolution photos: Gilbert Kless Photography Link to comment Share on other sites More sharing options...
firebirdude Posted May 16, 2015 Report Share Posted May 16, 2015 find the model number of the fan, look up the installation manual for it to find out which wire requires what source (in case red isn't switched and yellow isn't constant and black isn't ground), and wire the switched source to amps remote turn on, constant to amps power or to battery, and ground to ground. There is no switched source in computer fans. There are typically a maximum of four pins on a PWM fan (this is generally): Black: Ground Red: 12VDC+ Yellow: Tachometer signal (sense) Red: Control In OP's case, ignore the yellow wire, it's useless to you. Wire in a relay, use the remote turn-on as sense to the relay. I wouldn't use the remote turn-on as power for the fan, though some do. Bingo. Remote turn on to 85. Ground to 86. +12V constant to 30 and your fan's red wire to 87. 87a will go unused. Then just ground the fan's black wire wherever you're mounting it. Fan's yellow wire should be ignored in this instance. Link to comment Share on other sites More sharing options...
reedal Posted May 16, 2015 Report Share Posted May 16, 2015 find the model number of the fan, look up the installation manual for it to find out which wire requires what source (in case red isn't switched and yellow isn't constant and black isn't ground), and wire the switched source to amps remote turn on, constant to amps power or to battery, and ground to ground. There is no switched source in computer fans. There are typically a maximum of four pins on a PWM fan (this is generally): Black: Ground Red: 12VDC+ Yellow: Tachometer signal (sense) Red: Control In OP's case, ignore the yellow wire, it's useless to you. Wire in a relay, use the remote turn-on as sense to the relay. I wouldn't use the remote turn-on as power for the fan, though some do. got it. i dont use them, but now i know. sorry for the misinformation. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
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