Hello I have a beloved 03 STR and I am trying to install a new speakers for rear doors. But it has four wires running to the adapter and I can't find the right harness (ford one won't fit as it's only for non premium speakers).

Here are some pics so you have a better idea what I'm looking at.




Four wires behind this adapter coming from the amp



Four wires.. two for tweeters and two for midbass


Does that mean I need to get positive(+) tweeter and midbass wires to + of speaker and negative(-) tweeter and midbass wires to - of speaker?

 

I think you would get away with it , but possably not ,
I seperated the tweeter wires from the speaker cone and soldered them directly .
And ran seprate high and low pass using the factory amp to the new speakers that way .

 

So disregard the tweeter wires and solder the midbass to the speaker?

 

Not disregard the tweeters , cut the wires between the mid bass cone and the tweeter on your new speakers so thay are now seperate , and solder the mid bass wires to the mid bass speaker
And solder the tweeter wires to the tweeter ,