My 2017 fiesta st sub wiring short and quick.

Fiesta ST Battery Constant 12V+ Wire: Yellow/Red
Fiesta ST Accessory Switched 12V+ Wire: Run a primary wire to your steering column and use the violet/green wire in the ignition switch harness. This violet/green wire will provide you with a switched power source.
Fiesta ST Ground Wire: Black/Blue
Fiesta ST Illumination Wire: Blue
Fiesta ST Left Front Speaker Positive Wire (+): White
Fiesta ST Left Front Speaker Negative Wire (-): White/Brown
Fiesta ST Right Front Speaker Positive Wire (+): White/Violet
Fiesta ST Right Front Speaker Negative Wire (-): White/Orange
Fiesta ST Left Rear Speaker Positive Wire (+): White/Green
Fiesta ST Left Rear Speaker Negative Wire (-): Brown/Yellow
Fiesta ST Right Rear Speaker Positive Wire (+): Brown/White
Fiesta ST Right Rear Speaker Negative Wire (-): Brown/Blue

[@bulkypug3811]

You should have enough power for several 5000 watt amps. ⚡🔈

[@JustinOsh1]

I just put in an a system myself (6.5 components in the front, 6.5 coaxial in the rear, and sub to a 5 channel amp). The amp has high level inputs (no need for a line out converter). I've learned to tap into the front speakers for your input if you're not doing both front and rear. Phone and Android Auto audio goes through the fronts only!

[@arnoldbliss6238]

THANKS! :~))

[@Andyb44k]

Da gat in da glove box thooooo lol lol

[@markg5916]

Nice detail, doing the same thing this weekend. What setup are you going with? I see the Rockford amp, what subs and how much power?