Its not the circuit where the.ptt and updwn buttons are. I think its the rj45 to 8pin pig tail adapter ia missing wire inside the rj45 plug. If you look at the stock mic all 6 terminals are used well on the aftermarket wire only 4 are used.
★ Sent from my Droid★
That's interesting. Do you feel liuke trying a new rj45 plug with all 6 wires connected? My one concern might be that it causes damage to the radio. Maybe they were disconnected fo a reason.