Turner +2 is rely-switching from the factory, the 140 is, I believe , electronic-switching. You need to reverse the red and black ground wire to show the three tabs ,left to right 1-black ground, 2 or middle tab-red, right tab black, shield to mount, White to upper left switch connection. These connections are inside the Mic. If radio is supertuned(volted) A resistor might be needed to cut down squeel, a 4.7K is a good start goes across audio to shield. If needed add 1K at a time