Which wires give constant, ignition and ground on a 2016 Toyota Prius?
On a 2016 Toyota Prius, take constant power from the Purple wire at the OBD-II port, pin 16, ignition from the Purple wire at the dash fuse box, white 32-pin plug (lower connector), 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:OBD port and dash fuse boxSystem voltage:12VIgnition type:Push-button
Where do I get constant, ignition and ground on a 2016 Toyota Prius?
Constant is at the OBD-II port and ignition is at the dash fuse box. Both are Purple, so go by location.
Option 1 Constant and ignition
OBD port and dash
Under the dash, driver side.
Constant
Purple
OBD-II port, pin 1612V battery feed.
Ignition
Purple
Dash fuse box, white 32-pin plug (lower connector)Hot with the car on. Same color as the 12V wire, so go by location.
Ground
Body ground
Bare metal under the dashNever the battery negative post.
Meter before you tap.
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 2016 to 2022 Prius (guide 59741).
Where are the turn signal, reverse and light wires on a 2016 Toyota Prius 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
Tan
Main body ECU, driver side under the dash, white 30-pin plugGround 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 2016 to 2022 Prius (guide 59741).
Where are the brake, door, speed and CAN wires on a 2016 Toyota Prius for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
UnlockNegative -Not yet checked
Light Green
Main body ECU, driver side under the dash, white 30-pin plugUnlock input.
CAN dataDataNot yet checked
Light Blue (high)
White (low)
Main body ECU, driver side under the dash, white 30-pin plugNever 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 2016 to 2022 Prius (guide 59741). Turn, headlight, reverse, dome, door, brake and speed wires were not found.
Where are the fuse boxes and ground points on a 2016 Toyota Prius?
DiagnosticOBD-II portConstant on pin 16.
DashFuse box and main body ECUIgnition and body signals.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2016 Toyota Prius?
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 2016 Toyota Prius?
Changes2016New generation with different colors. 2023 and newer are not covered yet.
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This page covers the 2016 Toyota Prius hybrid 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 2016 Prius.
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 2016 Toyota Prius wiring
What wire is constant power on a 2016 Toyota Prius?
Purple at the OBD-II port, pin 16. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2016 Toyota Prius?
Purple at the dash fuse box, white 32-pin plug (lower connector). Hot with the car on. Meter it before you tap it.
Which years share wiring with the 2016 Toyota Prius?
2017, 2018, 2019, 2020, 2021, 2022. 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 2016 Toyota Prius 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.
★
Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2016 Toyota Prius 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.
