Which wires give constant, ignition and ground on a 2018 Chevrolet Volt?
On a 2018 Chevrolet Volt, take constant power from the Red/Purple wire at the blue 27-pin plug on the BCM, center console, pin 1, ignition from the Purple wire at the green 25-pin plug on the BCM, center console, pin 6, 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:Center consoleBest power spot:BCM plugsSystem voltage:12VIgnition type:Push-to-start (this page)
Where do I get constant, ignition and ground on a 2018 Chevrolet Volt?
Constant and ignition are on the body control module plugs in the center console.
Option 1 All the power
BCM plugs
Blue 27-pin and green 25-pin plugs in the console.
Constant
Red/Purple
Blue 27-pin plug on the BCM, center console, pin 112V battery feed. Fuse it close to the tap.
Ignition
Purple
Green 25-pin plug on the BCM, center console, pin 6Hot with the car on.
Accessory
Not found
Not in the guideNo accessory wire is listed.
Ground
Body ground
Bare metal under the dashNo ground wire in the guide. Never the battery negative post.
Push-to-start. Blue on pin 17 is the start/stop button wire. Never tap it.
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 guide for the 2016 to 2019 Volt with push-to-start (guide 94071).
Where are the turn signal, reverse and light wires on a 2018 Chevrolet Volt 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/Grey
White 26-pin plug on the BCM, center console, pin 22Ground when the parking lights are on. Meter it 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 2016 to 2019 Volt with push-to-start (guide 94071).
Where are the brake, door, speed and CAN wires on a 2018 Chevrolet Volt for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Blue/Yellow
Blue 27-pin plug on the BCM, center console, pin 7Positive with the pedal down.
CAN dataDataNot yet checked
Green (single wire CAN)
Blue 27-pin plug on the BCM, center console, pin 22GM single wire CAN. Never cut it or use it for power.
DoorsNot 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 2016 to 2019 Volt with push-to-start (guide 94071). Wires marked Not found were not in the guide.
Where are the fuse boxes and ground points on a 2018 Chevrolet Volt?
Center consoleBCM plugsConstant, ignition, brake, CAN.
Interior fuse panelFuse tapAccessory.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guide.
Where is the OBD-II port on a 2018 Chevrolet Volt?
OBD II
Diagnostic portOBD-II port: center consolePlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2018 Chevrolet Volt?
This page2018Chevrolet Volt, push-to-start.
Same wiring2016, 2017, 2019Fortin uses the same guide for these years.
Older Volt2011 to 2015Not covered yet.
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This page covers the 2018 Chevrolet Volt plug-in hybrid with push-to-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 Volt.
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 Volt wiring
What wire is constant power on a 2018 Chevrolet Volt?
Red/Purple at the blue 27-pin plug on the BCM, center console, pin 1. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2018 Chevrolet Volt?
Purple at the green 25-pin plug on the BCM, center console, pin 6. Hot with the car on. Meter it before you tap it.
Where is the brake wire on a 2018 Chevrolet Volt?
Blue/Yellow (positive +) at the blue 27-pin plug on the BCM, center console, pin 7. Positive with the pedal down. Meter it before you tap it.
Which years share wiring with the 2018 Chevrolet Volt?
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 Volt 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 Volt 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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