Try to do a search in google about "mercman harness" you will have a lot of information. If you have a chance to take out the radio, take some picture on the back of the radio, the plug(s), and the wires (both top and bottom row) and take some notes. After reading Accord's CD player pinout (24pin), there should be no difference between premium and non-premium head unit. Only that the Civic has fewer wires. Next, to confirm if the output is "differential balance", try to see if you can find the "Shield" wires (#8, 9, 20, 21). #17 should be AMP TURN ON. Third, the RCA cables would connect directly to FL+/-, FR+/-, RL+/-, and RR+/- without anything in between, AND NOT THE SHIELD WIRES. I am attaching Honda's 24pin plug pinout graph, and look into the "Premium" section to see if you can find the "Shield" wires on the physical plug. There's also one thing that concerns me. In the Accord the subwoofer crossover is IN THE RADIO (It has an extra 8-pin connector), not the AMP. So I don't know if the Civic is the same. I hope not.dude, your ideas are genius, it's exactly what i'm looking to do, i wish i could help, i know this audio pro dude but wont be able to see him till maybe next week sometime, i hope somone can step up
There are so many reasons why one would not put an aftermarket headunit in there. Some want the stock bluetooth that no other aftermarket come close in term of quality; some want to keep the iMID to display songs; some have navigation "Premium" head unit but want better sound quality; some live in area where crime is high...So I feel the finding actually can help lots of owners out. What do you think?wouldnt you rather put in a better hu thats not hideous and try to keep steering wheel controls linked to it?