I'm trying to make sure I found full time power for aftermarket gauges in a 94 Miata.
I tapped into the blue/red but trying to make sure it's actually full hot. When I have the multimeter hooked up with the car off and batter connected, it's showing negative volts. If I turn the key on it's positive.
my thinking is that it should always show positive volts regardless of key position...but I am an electrical noob. Help please??
