honda odyssey nav no audio

PIN A11  ORANGE                           - GROUND FOR LEFT AND RIGHT AUDIO

If your radio has and AUX  input, you could splice A pair af rca's to those wires and wire it to it, but you will only hear the audio while u are on Aux mode. I just did this 2 weeks ago on a Odyssey. Also you could do a seperate speaker and see if the output is strong enough to drive a small speaker. And rig up the mute wire to a relay to mute your radio.