CSHENG Posted May 10, 2022 Report Share Posted May 10, 2022 Greetings, so after i read through the samples for Aux relay switching, i made a mock up wiring diagram for my fan relay. mind to have a look? if it was fine to run a relay control circuit without a fuse. Load circuit is fused . the sample diagram attached below is how it will be wired up . Quote Link to comment Share on other sites More sharing options...
Confused Posted May 10, 2022 Report Share Posted May 10, 2022 Please check in the Help at Wiring Information -> Output Wiring -> Auxiliary Output Wiring -> Wiring Auxiliary Outputs, and specifically the section "Avoiding Auxiliary Output Back-feeding" If you're going to be using an Aux output, it's important to ensure that one side of the relay coil is only supplied with a switched feed, not a permanent feed. 30 = fused permanent feed from battery 87 = output to device (fan, etc) 86 = SWITCHED 12v feed - this should ONLY have power when ignition/main relay etc is switched on 85 = ECU Aux Output Quote Link to comment Share on other sites More sharing options...
Vaughan Posted May 10, 2022 Report Share Posted May 10, 2022 8 hours ago, CSHENG said: the sample diagram attached below is how it will be wired up . The output drives to ground not to 12V so you will need an ignition switched power supply on 85 rather than a ground Quote Link to comment Share on other sites More sharing options...
curly Posted May 11, 2022 Report Share Posted May 11, 2022 Your wiring diagram isn't really complete. Not sure if we're to assume 85 is grounded, since the symbol isn't present. If it is, then you need to move 86 to an ignition like Vaughan said. If you continue to use Aux 4, then it's a ground input and 85 needs switched 14v. If your fused 14v source on pin 30 is switched, you can jump it over to 85 to simplify the wiring a bit. Quote Link to comment Share on other sites More sharing options...
CSHENG Posted May 11, 2022 Author Report Share Posted May 11, 2022 Sorry . My mistake for creating the misunderstanding. I have reupload again with clearer path of my 85 terminals. This one is the one mostly everyone is taking about right? Vaughan 1 Quote Link to comment Share on other sites More sharing options...
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