Adding stock shaker to 9 speaker premium car help needed

[Robertp]

Well from the diagram I need the dsp module form the 12 speaker car and it looks like a harness in the trunk I need that goes from a bulk connector to the amp plug correct me if I’m wrong here guys, any input would be great

It’s a 18 400a car

Thanks
Robert

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[Diocletian]

From my knowledge the 9 speaker premium system doesnt have the necessary wiring harness for an amp hookup in the trunk like the Shaker equipped systems do. You will have to tap into the headunit and run it back to the trunk. I had a thread on this about a month ago, basically I decided on a Sub/amp box combo like this one here:
https://www.rockfordfosgate.com/products/details/p300-12/

Don't forget to get some 8 gauge wiring:
https://www.crutchfield.com/p_575RFK8/Rockford-Fosgate-RFK8.html

 

[Robertp]

I’m gonna check tonight to see if the wires are the connector as my car has the bulk connected there

 

[Robertp]

Also if it can’t be done stock I’m not doing it

 

[Diocletian]

Then if you want the biggest bang for your buck, replace your center channel speaker with a Polk db351. Easy to put in, and vastly cleans up your sound stage, cheap as hell too. No need for running new wires, it's a direct replacement:
https://www.mustang6g.com/forums/showthread.php?t=90179

I'm doing this first, everyone that has so far has been very impressed with the mod.

 

[Robertp]

So your car didn’t have the wires in the bulk connected in the trunk?

 

[Diocletian]

So your car didn’t have the wires in the bulk connected in the trunk?

I did not see them and further deep diving shows that if you didnt have a Shaker system from factory, you will NOT have the wires needed back there.

 

[Robertp]

Ford says the plug assembly is 9 bucks lol

 

[Diocletian]

Ford says the plug assembly is 9 bucks lol

"Ford chose not to run the cabling for the subwoofer in non-ShakerPro vehicles, so if your car didn't come with a sub from the factory you either have to run the cable for the factory sub or tie into the rear speakers for an aftermarket sub."

Quote from this thread:
https://www.mustang6g.com/forums/showthread.php?t=105567


Also, a clarification, you cannot tap into the rear speakers either, there is bass roll off there, which is why you are better off going to the headunit

 

[Robertp]

My car has a connected below that and per wiring diagram it is it I’ll verify

 

[Robertp]

So that connected below that pic in the link u posted is it, all the wires match up etc so if im not mistaken I can add the subwoofer and change the dsp module and everthing thing should work, am I missing anything???

 

[Diocletian]

That picture doesnt show the proper connectors, hence the other guys reply to it stating "No". My 2018 is also a GT Premium with 401a and I don't have the wiring for a sub back there

 

[Robertp]

U actually do per diagram there is a connecter down below those 2 in the picture and the connecter plugs into there the 18s are different I promise I just went they wiring diagrams on the 15-18 models and the 18 is different there is like s 36-40 pin connecter and it has all the sub wires in it

 

[Robertp]

I’ve ordered the harness and I’ll take a pic when I get it but I don’t know how to post pictures here lol

 

[Rocketman]

Please keep us posted. Like you, I don't want some janky Car Toys subwoofer in the trunk but rather the stock unit.

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