Which wires give constant, ignition and ground on a 2018 Chevrolet Cruze?
On a 2018 Chevrolet Cruze, take constant power from the Red/Brown wire at the blue 27-pin plug on the body control module, pin 4, ignition from the Yellow/Blue wire at the green 25-pin plug on the body control module, pin 3, 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:Body control moduleSystem voltage:12VIgnition type:Key start (this page)
Where do I get constant, ignition and ground on a 2018 Chevrolet Cruze?
Constant and ignition are on the body control module plugs.
Option 1 Main power
Body control module
Driver side, under the dash.
Constant
Red/Brown
Blue 27-pin plug on the body control module, pin 412V battery feed.
Ignition
Yellow/Blue
Green 25-pin plug on the body control module, pin 3Hot with the key in run.
Ground
Body ground
Bare metal under the dashNo ground color printed. Never the battery negative post.
No starter wire is listed in this guide.
Option 2 Backup
Fuse tap
For accessory power.
Accessory
Fuse tap
Interior fuse panelNot in the guide. Find a slot that is hot only in accessory and run.
Use an add-a-fuse.
From Fortin's install guides for the 2016 to 2019 Cruze with a key (guides 78531 and 92731).
Where are the turn signal, reverse and light wires on a 2018 Chevrolet Cruze 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
Green/Gray
White 26-pin plug on the body control module, pin 22Ground 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 guides for the 2016 to 2019 Cruze with a key (guides 78531 and 92731).
Where are the brake, door, speed and CAN wires on a 2018 Chevrolet Cruze for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
CAN dataDataNot yet checked
Light Green (single wire)
Blue 27-pin plug on the body control module, pin 22Single-wire GM data bus. Never cut or splice it.
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 guides for the 2016 to 2019 Cruze with a key (guides 78531 and 92731). Wires marked Not found were not in the guide.
Where are the fuse boxes and ground points on a 2018 Chevrolet Cruze?
Driver dashBody control modulePower, park light, CAN.
DashInterior fuse panelAccessory by fuse tap.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guide.
Where is the OBD-II port on a 2018 Chevrolet Cruze?
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 Chevrolet Cruze?
This page2018Chevrolet Cruze.
Same wiring2016, 2017, 2019Fortin uses the same guide for these years.
Not covered2013 to 2015 and push-buttonNot on this page.
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This page covers the 2018 Chevrolet Cruze compact sedan with a key start (new body, not the Cruze Limited).
The wire colors come from Fortin's install guide, read wire by wire. Our own team has not yet metered these on a 2018 Cruze.
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 Chevrolet Cruze wiring
What wire is constant power on a 2018 Chevrolet Cruze?
Red/Brown at the blue 27-pin plug on the body control module, pin 4. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2018 Chevrolet Cruze?
Yellow/Blue at the green 25-pin plug on the body control module, pin 3. Hot with the key in run. Meter it before you tap it.
Which years share wiring with the 2018 Chevrolet Cruze?
2016, 2017, 2019. 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 Chevrolet Cruze 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 Chevrolet Cruze 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.
