Mach 460 New Head Unit

Discussion in 'SN95 4.6L Mustang Tech' started by Paul1981610, Jun 15, 2014.

  1. Replaced the old 6 disc head unit for an aftermarket. Used all the proper harnesses but the rear subs aren't working. The door subs are. Now the one thing I don't know is if they were working before. Are there any issues that make the rear not work after a swap or could an amp be bad
  2. Probably a bad amp. I did the same thing but after a while the subs went kaput. Were they working with the old head unit?