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"Low Side Output" is a grounding circuit; it either grounds the output or it doesn't. Your rusEFI Low Side Outputs should go to one activation pin of the relay (pin 85 on the relay) and keyed power to the other (pin 86 of the relay). It sounds like you probably did it right.
okey then i did right 
then i don´t know what i did wrong https://ibb.co/q3fXzvF6
i use pin 20 and 21 in the ecu harnes for activate the relay
https://ibb.co/JjWXfxt9 that is my logg with just the usb connected it looks wierd right?
Statistics: Posted by turbomuts — Sat Oct 11, 2025 3:40 pm
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I had connected the activation for my main relay and fuel pump relay to B9 Main Relay Weak Low Side Output 1 and B16 Low Side Output 4 / Fuel Pump Relay, but when I looked at the car’s original wiring diagram, those are supposed to be grounded, not receive a control voltage.
Yet the relays still clicked on, so I’ve probably managed to damage something.
Statistics: Posted by turbomuts — Sat Oct 11, 2025 7:22 am
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With Rusefi, I’m trying to keep it as plug-and-play as possible with such an old ECU setup like LH2.4. In the PnP harness, I’m using the functions for controlling the ignition box, all relays such as the fuel relay, etc. I’ve also wired in the engine temperature sensor and the VR signal from my 60-2 flywheel. However, that stopped working — I’m getting a lot of missing teeth, so I’ll try running separate wires to it, like I already did with the MAP sensor, IAT, and TPS.
I’m afraid I may have damaged the board when I cleaned off the flux residue I missed after soldering the Molex connectors on the board using isopropanol. After that, I started getting interference on the VR signal, and I also get the message “C9012: out-of-order coil of coil 1” in the Rusefi console. I even get that error when I run a spark test in the console with only the Uaefi board connected to the computer.
Statistics: Posted by turbomuts — Wed Oct 08, 2025 12:34 pm
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