I bought a Pioneer 4800 headunit, installed and everything, but the gain amp doesn't work. The bass sounds pretty good, but not nearly as good as with the stocker. If I connect the pink power antenna wire up to 12v from the headunit, the gain slider lights up, and the rear speakers go crazy with interference it sounds like. Doesn't produce any music whatsoever. Cracked open the FSM, doesn't seem to give me much info, but it seems it doesn't get 12v... maybe 8v, but I couldn't find a direct answer. Does anyone know what the voltage is for the remote turn on for the factory amp? Or anyone have aftermarket HU with factory gain amp?
'89 SSE - GX3 -190k, 155k on body - Back for another ride.