Which wires give constant, ignition and ground on a 2015 Subaru Legacy?
On a 2015 Subaru Legacy, take constant power from the White wire at the white 8-pin ignition switch plug, steering column, ignition from the Green wire at the white 8-pin ignition switch plug, 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 switch plugSystem voltage:12VIgnition type:Key start (this page)
Where do I get constant, ignition and ground on a 2015 Subaru Legacy?
Constant, ignition and accessory are on one plug at the key cylinder.
Option 1 All the power
Ignition switch plug
White 8-pin plug on the key cylinder, under the column cover.
Constant
White
White 8-pin ignition switch plug, steering column12V battery feed.
Ignition
Green
White 8-pin ignition switch plug, steering column, pin 1Hot with the key in run.
Accessory
Yellow
White 8-pin ignition switch plug, steering column, pin 2Accessory.
Ground
Body ground
Bare metal under the dashNo ground color printed. Never the battery negative post.
Starter wires are White/Black (pin 3) and Green/Red (pin 7). Never tap them.
Option 2 Backup
Fuse tap
If you would rather not open the column.
Ignition
Fuse tap
Interior fuse panelBackup: a slot that is dead off and hot on.
Use an add-a-fuse.
From Fortin's install guide for the 2015 to 2017 Legacy with a key (guide 82731).
Where are the turn signal, reverse and light wires on a 2015 Subaru Legacy 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
Black
White 20-pin plug at the parking light switchGround when the parking lights are on.
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 2015 to 2017 Legacy with a key (guide 82731).
Where are the brake, door, speed and CAN wires on a 2015 Subaru Legacy for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
CAN dataDataNot yet checked
Red (high)
Blue (low)
White 40-pin plug behind the fuse boxNever cut or splice the CAN wires.
DoorsNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
BrakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
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 2015 to 2017 Legacy with a key (guide 82731). Wires marked Not found were not in the guide.
Where are the fuse boxes and ground points on a 2015 Subaru Legacy?
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2015 Subaru Legacy?
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 2015 Subaru Legacy?
This page2015Subaru Legacy.
Same wiring2016, 2017Fortin uses the same guide for these years.
Other years2013, 2014Different plug. Check the page for your year.
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This page covers the 2015 Subaru Legacy midsize sedan with a key start.
The wire colors come from Fortin's install guide, read wire by wire. Our own team has not yet metered these on a 2015 Legacy.
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 2015 Subaru Legacy wiring
What wire is constant power on a 2015 Subaru Legacy?
White at the white 8-pin ignition switch plug, steering column. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2015 Subaru Legacy?
Green at the white 8-pin ignition switch plug, steering column, pin 1. Hot with the key in run. Meter it before you tap it.
Which years share wiring with the 2015 Subaru Legacy?
2016, 2017. Fortin uses the same guide for these years.
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 2015 Subaru Legacy 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 2015 Subaru Legacy 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.
Want to be famous?
Your name, right on this page, for everyone who uses it to see. Add your tip and your photos in one box.
