TSP Posted September 1, 2017 Report Share Posted September 1, 2017 hello, I have a link atom installed using aux 3 to control n/c relay for a engine fan, I have set the polarity up and engine temp and its all working like it should, The only problem i have is when the engine reaches its operating temp of 82 degrees the fan will switch on like it should but when the ignition is turned off the car will run on and after about 5 seconds will drop power and turn off. This only happens when the fan is running. any thoughts would be appreciated cheers. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 1, 2017 Report Share Posted September 1, 2017 It sounds like the 12V supply side of your relay must be live all the time. Any 12V supply for an Aux must come from an ignition switched source. Below is the basics, if you need more detail, have a read of the whole page in the help file which is found under: G4 ECU Tuning Functions > Auxiliary Outputs >Wiring Auxiliary Outputs Quote Link to comment Share on other sites More sharing options...
TSP Posted September 1, 2017 Author Report Share Posted September 1, 2017 (edited) Cheers for the reply, its defiantly from a ignition source, Attached is a diagram of how i have the relay set up. if i remove the Ground 86, to the relay it will still run on. and if i switch the aux 3 off, it will run as normal cheers. Edited September 1, 2017 by Tracksideperformance Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 1, 2017 Report Share Posted September 1, 2017 So are you saying that even if the aux 3 is not actually connected to anything, the ECU still stays live? What other auxes do you have set up? Can you attach your map? Quote Link to comment Share on other sites More sharing options...
TSP Posted September 3, 2017 Author Report Share Posted September 3, 2017 Yup the ecu will still hold power, But if i turn Aux 3 off in pc link, then it will run fine, it seems to only happen when the fan is grounded. I will attach the map file when i get back. cheers. Quote Link to comment Share on other sites More sharing options...
TSP Posted September 13, 2017 Author Report Share Posted September 13, 2017 Attach is a pcl as you request. cheers. Hayden iggo dx sr20det.pcl Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted September 13, 2017 Report Share Posted September 13, 2017 Your using a change over relay. Use a normally open dual 87. Quote Link to comment Share on other sites More sharing options...
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