I installed a sony cdx-m750 deck in yesterday, using wiring harness 70-1771. Everything works fine, but I lost my midrange... there are two wiring harnesses that are used for the stock deck. I only used the one harness, but after tracing the wires I find that the second harness is for the rear factory amps and I'd assume the front midrange as well. Is there a way to hook this up so I get my midrange back? Is there a second harness I can get or a wiring diagram and I can hook up line level converters or something. On the back of my deck I have outputs for rear and front amps. Maybe with a wiring diagram I could run the power and stuff with the other wires, then do the line level converter to the rca outputs on the deck. Anyone have any ideas, advice, expirience with mustangs, etc.? Thanks for the help.
Go to your local shop...They should have the harness you'd need to by-pass the factory amp and stuff.....
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I'm having the same problem with my 02. The second harness your refering to should have 8 wires. Each rear amp uses 3 wires from the head unit (+, -, and remote). The other 2 wires appear to be unsheilded grounds which I have no idea about and do not make it to the amps. If you look at the amps in the trunk, you'll see the 3 power wires going in and can get the colors. I have been looking for a month and have not found a second harness for these amps! And when I tried rigging the power leads my mids were restored, but there was ALOT of feedback and noise. I scrapped the factory project and am rewiring the system and installing a new Kenwood 4-channel instead.
Here's what I have been able to find out about the Factory Mach 460 amps: Front amp handles all 4 2-inch tweeters, 1 rear amp handles the front 2 6x8's, and the other rear amp handles the rear 2 6x8's. All speaker wires are run through the first amp, then redistributed to the other 2 (preamping). The power leads for the rear amps are in the second harness. The following sites are good starting points: https://www.flemworld.com/95/mach.html and https://carstereohelp.com/wireharnessFord1.htm