dpuma8 Posted August 14, 2015 Share Posted August 14, 2015 I have Megasquirt 2 3.57 with relay board and I would like to control my eBay fan but am not sure how to wire it up. I am assuming the relay will be 30>>fuse>>Battery, 87>>Fan, 86>>Ground, and 85>> somewhere on the Megasquirt relay board? Is this correct? Are there any additional wiring mods needed for my MS2? Thanks! Quote Link to comment Share on other sites More sharing options...
Spike243 Posted August 15, 2015 Share Posted August 15, 2015 Are you using a fast idle solenoid on your car? Or a PWM idle valve? This will change the instructions I have below If you are not using either of these valves, then you can use the FIDLE output on the relay board. You would have to look at the relay board manual here and install a jumper to make the FIDLE relay on the relay board provide 12V just like you are expecting in the wiring you mentioned (86>>Ground, and 85>> somewhere on the Megasquirt relay board). You can then wire pin 85 to the FIDLE terminal on the relay board. Then in tunerstudio you will program the FIDLE output to come on at your desired temperature Quote Link to comment Share on other sites More sharing options...
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