Post by
qsiguy »
https://forums.nicoclub.com/qsiguy-u27015.html
Wed May 19, 2010 7:43 pm
You just need a SPST switch. It's either on or off (connected or disconnected). Assuming this is a recent ECU mod, if the two wires are disconnected you are in Stage II, if they are connected you are in Stage III. I think this is the same as the old ones but I can only say for sure on the newer ones since I am probably the one that built it. Do not wire anything to these wires, no ground or power, it's just a loop that you either connect or disconnect. If I did it there should be a sticker on the ECU explaining which mode you are in when the wires are connected or disconnected.
Cheers.