94 mustang 460 replacement

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=133103
Printed Date: May 17, 2025 at 12:55 AM

Topic: 94 mustang 460 replacement

Posted By: qtownhb
Subject: 94 mustang 460 replacement
Date Posted: December 27, 2012 at 9:27 PM

I'm replacing the head unit on my 1994 Ford Mustang with the Mach 460 system.

I got a new sony head unit and the wiring harness. When I plugged it in, it worked, but the amps did not come on. So I put the old stock stereo in and still no amp (you have to turn it alll the way up to get sound).

I assume I did something to kill the amp. Not sure what to do now. Neither the old nor the new stereo work now.

I checked every fuse under the hood and under the steering wheel with a meter and visually.

Thoughts???

Replies:

Posted By: DYohn
Date Posted: December 28, 2012 at 12:51 PM

Which wiring harness did you use?

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Posted By: qtownhb
Date Posted: December 28, 2012 at 12:58 PM

I got one from Crutchfield

https://www.crutchfield.com/p_120705510/Receiver-Wiring-Harness.html?tp=2977

Posted By: DYohn
Date Posted: December 28, 2012 at 1:07 PM

OK, that harness can allow the +12V turn-on signal from your new head unit to reach the OEM amplifier when it only needs a +5V signal, so it is possible you blew the remote on circuit in the amp. Did it pop the first time you turned it on? I don't recall if the amp has a fuse inside it or not... Also, did you disconnect the battery when you installed the system? If not try disconnecting the battery for 5 minutes to reset the system.

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