We recently swapped 2zz on my car and apparently a/c compressor doesn't kick in. Checked all the wiring and everything is intact. Jumped the pressure switch still no-go.
This leads me to believe that there's no rpm signal going to the a/c amplifier or if there is it might be too weak for it to understand. My tachometer is working using tach adapter so I assume the amplifier should also see that.
Does anyone knows how many volts an RPM signal needed for the a/c amplifier?