Retaining Factory Amp October 02, 2010, 06:38:36 PM I have been tring to install an aftermarket cd player in my Mark and would like to retain the factory amp. I got the Scosche wiring harness, got all that junk hooked up, except for the 1 red wire that was bolted to the back of the factory stereo. I'm pretty sure that it is just a ground, but when I ground it I get no sound, but if I leave it disconnected to anything, I get power and sound, but it will cut out when turned up a littlle loud. I have no idea what to do with the red wire, I know it is a common ground system, and I think I used this on my 20th back when I was in high school http://www.scosche.com/products/sfID1/151/sfID2/159/productID/999 and I got it working with that, I just don't remember what I did with the red wire that was bolted to the back of the factory radio..... Would I connect that to the black wire coming out of the scosche interface in the link? Quote Selected
Retaining Factory Amp Reply #1 – October 02, 2010, 07:50:22 PM I didnt use any contraption like that when I hooked up my aftermarket deck in my Mark 7 But my car was an 88 I think the wiring is different . So I dont think I can help . Quote Selected
Retaining Factory Amp Reply #2 – October 02, 2010, 07:55:53 PM Did you have the red wire bolted to the back of the stock radio? Quote Selected
Retaining Factory Amp Reply #3 – October 02, 2010, 08:05:17 PM Quote from: 20thanniver-ls;337649Did you have the red wire bolted to the back of the stock radio?Nope , the 84-87 is a common ground system the later ones are not sorry Quote Selected
Retaining Factory Amp Reply #4 – October 02, 2010, 08:06:16 PM Just a thought , did you try reducing the gain on your adapter thingy Quote Selected
Retaining Factory Amp Reply #5 – October 02, 2010, 08:06:38 PM Ah, I did not know that. Well, I bought the interface anyhow, we will se how it goes... Quote Selected
Retaining Factory Amp Reply #6 – October 02, 2010, 08:10:54 PM Quote from: hypostang;337651Just a thought , did you try reducing the gain on your adapter thingyI was trying to install it without the adapter, I have the adapter now, hooking up wires as I type Quote Selected
Retaining Factory Amp Reply #7 – October 02, 2010, 08:12:02 PM There is an audio section on that other forum I told you about You may find some help there Quote Selected
Retaining Factory Amp Reply #8 – October 02, 2010, 09:07:02 PM Didn't find much there for an 87 mark.... I know there is a non factory amp connector in thunderbirds and cougars - but I can't seem to find one for the Mark..... That would be the way to go LOL Quote Selected
Retaining Factory Amp Reply #9 – October 02, 2010, 10:09:24 PM Do you have the big JBL amp? If so I have a harness to by pass it that you can have Quote Selected
Retaining Factory Amp Reply #10 – October 02, 2010, 10:14:23 PM I'm really not sure, I know it has premium sound, but don't know if it's the JBL system or not. Do you have a part number or link to where I can see what the bypass look like? Quote Selected
Retaining Factory Amp Reply #11 – October 02, 2010, 10:19:37 PM this is the bypass unit Quote Selected
Retaining Factory Amp Reply #12 – October 02, 2010, 10:44:10 PM And that hooks up to the amp? Quote Selected
Retaining Factory Amp Reply #13 – October 02, 2010, 10:59:05 PM no it by-passes the factory JBL amp Quote Selected
Retaining Factory Amp Reply #14 – October 02, 2010, 11:06:11 PM Where does it plug in? Or does it plug into the speaker harness inside the dash to bypass the amp? Quote Selected
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