did one on a 07 accord . if i remember correct you got to pull the carpet away form the firewall even then it was a bitch. i think i tape the power wire to the end of a coat hanger and pushed it through the firewall to snake it through to were i could grab it . it was dark out when we ran the power wire so i dont remeber waht the dash look like under there but if i remember correct that is what we did.