12v or 5 volt

[colby8100]

I'm trying to arm my nitrous. I have digital frequency in 1 to turn it on. Do I need a 12v or 5 v to it. It's on ms3pro

[nathaninwa]

Check the Pro manual. Page 10. Digital I/O's are ground switched where the single digital switched 12v in would be used for triggering pro with nitrous 12v positive

[colby8100]

I thought it was a ground input but when I tried it,it didn't turn on the indicator. So I read the manual and it pretty much says there is only 1 12v input. My 12v input is on my trans brake for launch control. Maybe it was a bad ground I'll try again tomorrow

[nathaninwa]

Was the engine running? Some of the switched table stuff doesn't work unless it sees rpm. I found this out setting up launch control

[colby8100]

I can't remember I'll check again tomorrow. I just found a few issues in my data log. The voltage I'm seeing and the voltage the ecu is seeing is different. Then when I parked it my turbo feed line busted and I have a slight fuel drip from the an fitting. I'll ground it better tomorrow and see what happens. But under the ? in tuner studio it says expects a 12v signal

[nathaninwa]

Page 212 in the manual. Recommends the 12v in to simplify wiring. If using the others ground switch should be it. I'm using digital input for LC and ground works