Which wires give constant, ignition and ground on a 2012 Ford Fiesta?
On a 2012 Ford Fiesta, take constant power from the Red wire at the black 8-pin plug on the ignition barrel, steering column, pin 4, ignition from the Brown/Yellow wire at the black 8-pin plug on the ignition barrel, steering column, pin 1, and ground to clean, bare body metal. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
OBD-II port:Under the dash, driver sideBest power spot:Ignition barrel plugSystem voltage:12VIgnition type:Key and push-button (this page)
Where do I get constant, ignition and ground on a 2012 Ford Fiesta?
Key start: one plug at the ignition barrel. Push-button: the driver kick panel connector.
Option 1 Key start
Ignition barrel plug
Black 8-pin plug on the steering column.
Constant
Red
Black 8-pin plug on the ignition barrel, steering column, pin 412V battery feed.
Ignition
Brown/Yellow
Black 8-pin plug on the ignition barrel, steering column, pin 1Hot with the key in run.
Accessory
Purple/Green
Black 8-pin plug on the ignition barrel, steering column, pin 6Accessory.
Ground
Body ground
Bare metal under the dashNo ground wire in the guide. Never the battery negative post.
Start is Blue/White on pin 7. Never tap it.
Option 2 Push-button
Driver kick panel connector
Black connector behind the driver kick panel.
Constant
Yellow/Red
Black connector at the driver kick panel (screw terminal)12V battery feed.
Ignition
Blue/White
Black connector at the driver kick panelHot with the button on.
Ground
Body ground
Bare metal at the kick panelNo ground wire in the guide. Never the battery negative post.
Never tap the start button wire.
Key start from Fortin's install guide for the 2011 to 2013 Fiesta with a key (guide 58111). Push-button from Fortin's install guide for the 2011 to 2013 Fiesta with push-button start (guide 95411).
Where are the turn signal, reverse and light wires on a 2012 Ford Fiesta for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
Left turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Right turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Park lightNegative -Not yet checked
White/Purple
Yellow/Blue
Gray plug on the parking lights switchTwo parking light wires. Meter them first.
HeadlightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
ReverseNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Dome lightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Each chip shows the main insulation color with its stripe. Source: Fortin's install guide for the 2011 to 2013 Fiesta with a key (guide 58111) and Fortin's install guide for the 2011 to 2013 Fiesta with push-button start (guide 95411).
Where are the brake, door, speed and CAN wires on a 2012 Ford Fiesta for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
CAN dataDataNot yet checked
Gray/Orange (high)
Purple/Orange (low)
OBD-II port, pins 3 and 11Never cut or splice the CAN wires.
DoorsNegative -Not yet checked
Green/Purple
Black 16-pin plug in the driver door bootDriver door, from the key guide. Ground when the door is open.
BrakePositive +Not yet checked
Green/Blue
Green plug on the brake pedal switchFoot brake, from the push-button guide. Positive with the pedal down.
Parking brakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Source: Fortin's install guide for the 2011 to 2013 Fiesta with a key (guide 58111) and Fortin's install guide for the 2011 to 2013 Fiesta with push-button start (guide 95411). Wires marked Not found were not in the guides.
Where are the fuse boxes and ground points on a 2012 Ford Fiesta?
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2012 Ford Fiesta?
OBD II
Diagnostic portOBD-II port: under the dash, driver sidePlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2012 Ford Fiesta?
This page2012Ford Fiesta.
Same key wiring2011, 2013, 2014, 2015, 2016, 2017, 2018, 2019Fortin draws the same key wiring for all these years. Push-button is covered 2011 to 2013.
Not coveredPush-button 2014 and newerNot on this page.
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This page covers the 2012 Ford Fiesta subcompact with a key start or push-button start.
The wire colors come from Fortin's install guides, read wire by wire. Our own team has not yet metered these on a 2012 Fiesta.
Written by API Signal, fleet GPS and camera installers for 35+ years across Georgia, South Carolina and North Carolina, installing every major telematics and camera brand. Every wire on this page lists its source.
Test every wire with a meter before you tap it
No wiring information is ever guaranteed. Colors and locations change with trim, options and build date, and the manufacturer can change them in the middle of a model year. We share this as a starting point for installers, and you are responsible for confirming every connection on the vehicle in front of you.
Common questions about 2012 Ford Fiesta wiring
What wire is constant power on a 2012 Ford Fiesta?
Red at the black 8-pin plug on the ignition barrel, steering column, pin 4. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2012 Ford Fiesta?
Brown/Yellow at the black 8-pin plug on the ignition barrel, steering column, pin 1. Hot with the key in run. Meter it before you tap it.
Where is the brake wire on a 2012 Ford Fiesta?
Green/Blue (positive +) at the green plug on the brake pedal switch. Foot brake, from the push-button guide. Meter it before you tap it.
Help build this page
Had the panels off on one of these? Show the next installer what you found.
No one has sent photos for the 2012 Ford Fiesta yet, so yours could be the first. Every photo, wire color and tip we use goes on this page with your name on it, and it saves the next installer time under the dash.
1. Snap it
The plugs, tap points, fuse boxes and ground points. Phone photos are fine.
2. Send it
Tap "Add yours" at the top of this page. Your tip and your photos go in the same box.
3. See your name on it
We check every tip, then post it here "Compliments of" you, by name.
Compliments of
The installers who helped build this page.
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Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2012 Ford Fiesta gets their name here, and it stays here.
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Every tip we use gets a creditThe wire you checked is marked "Checked on a vehicle, compliments of" you.
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