Which wires give constant, ignition and ground on a 2018 Subaru Forester?
On a 2018 Subaru Forester, take constant power from the Red wire at the brown 9-pin plug under the driver dash, pin 6, ignition from the Purple wire at the white 30-pin plug under the driver dash, 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:Driver dash plugsSystem voltage:12VIgnition type:Push-button (this page)
Where do I get constant, ignition and ground on a 2018 Subaru Forester?
Power is split across plugs under the driver dash on this push-button Forester.
Option 1 All the power
Driver dash plugs
Brown 9-pin and white 30-pin plugs.
Constant
Red
Brown 9-pin plug under the driver dash, pin 612V battery feed.
Ignition
Purple
White 30-pin plug under the driver dashHot with the button on. Two Purple wires are on this plug, so meter to tell ignition from accessory.
Accessory
Purple
White 30-pin plug under the driver dashAccessory. Same color as ignition. Meter it.
Ground
Body ground
Bare metal under the dashNo ground color printed. Never the battery negative post.
Starter is Brown or Pink on the white 18-pin plug. Never tap it.
Option 2 Backup
Fuse tap
For switched power.
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 2017 to 2018 Forester with push-button start (guide 95551).
Where are the turn signal, reverse and light wires on a 2018 Subaru Forester 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 lightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
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 2017 to 2018 Forester with push-button start (guide 95551).
Where are the brake, door, speed and CAN wires on a 2018 Subaru Forester for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
CAN dataDataNot yet checked
White (high)
Red (low)
White 30-pin plug under the driver dashNever 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 2017 to 2018 Forester with push-button start (guide 95551). Wires marked Not found were not in the guide.
Where are the fuse boxes and ground points on a 2018 Subaru Forester?
DashDriver dash plugsPush-button power, 2014 to 2018.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2018 Subaru Forester?
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 2018 Subaru Forester?
This page2018Subaru Forester.
Same wiring2017Fortin uses the same guide for these years.
Other years2013, 2014, 2015, 2016Different plugs. Check the page for your year.
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This page covers the 2018 Subaru Forester compact SUV with push-button start.
The wire colors come from Fortin's install guide, read wire by wire. Our own team has not yet metered these on a 2018 Forester.
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 2018 Subaru Forester wiring
What wire is constant power on a 2018 Subaru Forester?
Red at the brown 9-pin plug under the driver dash, pin 6. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2018 Subaru Forester?
Purple at the white 30-pin plug under the driver dash. Hot with the button on. Meter it before you tap it.
Which years share wiring with the 2018 Subaru Forester?
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 2018 Subaru Forester 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 2018 Subaru Forester 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.
