gibbo frst

iTrader: (2)

can anyone tell me which terminal on an injector (air injector) is the positive.. was old that they have polarity markings on them but cant see markings on any of mine.. say you are looking at it from the top with the plug facing you.. i have been told 2 different answers now so hope someone can help.. ta

foreigneRS

unless there's a diode inside, can't see that it makes a difference which way they're connected