Which wires give constant, ignition and ground on a 2024 Toyota Highlander?
On a 2024 Toyota Highlander, take constant power from the Black wire at the body ECU behind the glove box, white 30-pin plug A, ignition from the Tan wire at the body ECU behind the glove box, white 30-pin plug B, and ground to the White/Black wire at the body ECU behind the glove box, white 30-pin plug A. 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 ECU plugsSystem voltage:12VIgnition type:Push-button
Where do I get constant, ignition and ground on a 2024 Toyota Highlander?
Power is on two white 30-pin plugs at the body ECU behind the glove box.
Option 1 Constant and ground
ECU plug A
White 30-pin plug, behind the glove box.
Constant
Black
Body ECU behind the glove box, white 30-pin plug A12V battery feed.
Ground
White/Black
Body ECU behind the glove box, white 30-pin plug AGround.
CAN is on this plug too.
Option 2 Ignition
ECU plug B
The second white 30-pin plug.
Ignition
Tan
Body ECU behind the glove box, white 30-pin plug BIgnition 1.
Ignition 2
Yellow
Body ECU behind the glove box, white 30-pin plug BIgnition 2.
Starter is Pink on plug B. Never tap it.
From Fortin's install guides for the 2024 to 2025 Highlander (guide 116311, push-button).
Where are the turn signal, reverse and light wires on a 2024 Toyota Highlander 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 guides for the 2024 to 2025 Highlander (guide 116311, push-button).
Where are the brake, door, speed and CAN wires on a 2024 Toyota Highlander for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
Power liftgateNegative -Not yet checked
Gray
Blue 6-pin plug at the liftgate switchLiftgate switch input.
CAN dataDataNot yet checked
Green (high)
White (low)
Body ECU behind the glove box, plug ANever cut or splice the CAN wires.
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 2024 to 2025 Highlander (guide 116311, push-button). Turn, headlight, reverse, dome, brake and speed wires were not found.
Where are the fuse boxes and ground points on a 2024 Toyota Highlander?
Steering columnIgnition or steering lock plugPower on 2014 to 2021 trucks.
Behind the glove boxSmart key module and body ECUPower on 2022 and newer.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2024 Toyota Highlander?
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 2024 Toyota Highlander?
This page2024Toyota Highlander, gas.
Same wiring2025Fortin uses the same guide for these years.
Help build this pageWant to be famous?Share a wire color, a photo or a tip for this vehicle, and your name goes on this page.
Add yoursClose▾
This page covers the 2024 Toyota Highlander SUV (gas). Hybrid models use different Fortin guides and are not covered here.
The wire colors come from Fortin's install guides, read wire by wire. Our own team has not yet metered these on a 2024 Highlander.
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 2024 Toyota Highlander wiring
What wire is constant power on a 2024 Toyota Highlander?
Black at the body ECU behind the glove box, white 30-pin plug A. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2024 Toyota Highlander?
Tan at the body ECU behind the glove box, white 30-pin plug B. Ignition 1. Meter it before you tap it.
Which years share wiring with the 2024 Toyota Highlander?
2025. 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 2024 Toyota Highlander 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 2024 Toyota Highlander gets their name here, and it stays here.
★
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.
