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1986 Mercury Marquis stereo wiring

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=32995
Printed Date: May 10, 2025 at 7:48 AM


Topic: 1986 Mercury Marquis stereo wiring

Posted By: Donnabopp
Subject: 1986 Mercury Marquis stereo wiring
Date Posted: May 30, 2004 at 6:21 PM

I am trying to replace original radio in a 1986 Mercury Marquis with a CD player. Wiring is pastel colors with stripes--have no idea which wire is which.

Can anyone help?



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Donna Bopp



Replies:

Posted By: Djmajicmark1
Date Posted: May 30, 2004 at 6:28 PM

read my reply in the other post you made. get the wire harness, should match the colors on the new HU wiring then just plug in




Posted By: auex
Date Posted: May 31, 2004 at 1:10 AM
More then likely common ground and you will have to rewire the car. Here is a link to the stereo wiring diagram for your car, here.

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Posted By: Chad7n7
Date Posted: May 31, 2004 at 1:05 PM
The grand marquis' do in fact share a common ground, the best option would probably be to get an aftermarket harness as DJmajicmark has implied, therfore you will not have to cut the factory harness, and run new wires to each speaker., cleanest and easiest solution to the "common ground".  Metra's harness no. is a 70-1770

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