2003 Ford Expedition, Factory Sub to Aftermarket Radio
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=111690
Printed Date: May 20, 2024 at 1:56 PM
Topic: 2003 Ford Expedition, Factory Sub to Aftermarket Radio
Posted By: costello4936
Subject: 2003 Ford Expedition, Factory Sub to Aftermarket Radio
Date Posted: February 17, 2009 at 2:48 PM
i have a 2003 ford expedition with factory sub i want to hook up to my jensen vm 9512 head unit. any help would be great
Replies:
Posted By: paidnfull
Date Posted: February 17, 2009 at 2:51 PM
Metra 70-5521 harness will get the sub workin
Posted By: soundnsecurity
Date Posted: February 17, 2009 at 3:04 PM
you need to find the input wires to the factory amp that drives the factory sub. it's probably next to the factory sub itself. once you find the amp i think there will only be 4 or 5 wires going into it. 2 wires will be 12v+ and ground. a third might be switched 12v to turn the amp on. the 2 that are left should be the signal wires. (test each one of these wires with a digital voltage meter, if you are not sure what a wire does leave it alone)
if you find the signal wires and are sure of what they are, the next step is to run a single RCA from the blue sub output from the jensen to the factory amps' signal wires that you found. cut the end off of the RCA to expose the 2 wires inside and hook that to your signal wires that you found. solder and tape if possible. this should work but there is a good chance your sub will sound weaker because the sub output from the jensen TVs are notoriously weak.
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Posted By: paidnfull
Date Posted: February 17, 2009 at 4:44 PM
Or you could just use the correct harness. The one mentioned above is designed to retain the factory sub.
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