Compact sedan, gas and Hybrid. Key or push-button start.
★
Help build this pageWant to be famous?Share a wire color, a photo or a tip for this truck, and your name goes on this page.
Add yoursClose▾
Which wires give constant, ignition and ground on a 2020 Toyota Corolla?
On a 2020 Toyota Corolla, take constant power from the Blue wire at the steering lock plug (push-button cars), black 7-pin, pin 7, ignition from the Black wire at the steering lock plug, black 7-pin, pin 6, and ground to clean, bare body metal. Meter every wire first.
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 truck in front of you.
This page covers the 2020 Toyota Corolla sedan, the first year of this body.
The Corolla came with a key or push-button start; the Hybrid is push-button. This page is short: power wires for both types, the park light and CAN. The rows come from 2020 sources. Our own team has not yet metered these on a 2020 car.
OBD-II portLocation not confirmed
Best power spotIgnition switch plug or steering lock plug
System voltage12V
Ignition typeKey or push-button
Need More Installs?
We send fleet installation work to independent installers. One job goes to one installer. Now adding network partners in North Carolina.
Where do I get constant, ignition and ground on a 2020 Toyota Corolla?
Take constant, ignition and ground from the same area.
Option 1 Push-button
Steering lock plug
Push-button cars and Hybrid. Black 7-pin plug.
Constant
Blue
Steering lock plug (push-button cars), black 7-pin, pin 7Always hot.
Ignition
Black
Steering lock plug, black 7-pin, pin 6Hot in run.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post.
From the iDatalink guide for 2020 push-button cars. The Corolla Hybrid uses the same rows. The Corolla Hatchback has different colors and is not covered here.
Option 2 Key cars
Ignition switch plug
Key cars. Steering column, white 8-pin plug.
Constant
Color not given
Dash fuse box, white 1-pin plugMain battery feed. The list gives no color, and it is a heavy feed. For a small device use the fuse box instead.
Ignition
Black
Ignition switch, white 8-pin plug, pin 8Hot in run.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post.
Accessory
Red
Ignition switch, white 8-pin plug, pin 6Hot in accessory and run.
These are not the same colors or pins as the 2019 and older Corolla. No starter or second ignition wire was found for key cars.
Push-button colors from the iDatalink guide. Key-car colors from a 2020 Corolla key-sedan wire list on the12volt.
What are the turn signal, reverse and light wires on a 2020 Toyota Corolla?
Circuit
Wire color
Location and what it does
Left turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Right turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Park lightPositive +Not yet checked
Blue
Dash fuse box, white 36-pin plug, pin 30Hot with the park lights on. A negative trigger, Green, is at the headlight switch, white 40-pin plug, pin 3; the installer list and iDatalink agree on that one.
HeadlightNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
ReverseNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Dome lightNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Each chip shows the main insulation color with its stripe. Sources: a 2020 Corolla key-sedan wire list on the12volt and the iDatalink guide.
Where are the brake, door, speed and CAN wires on a 2020 Toyota Corolla?
Circuit
Wire color
Location and what it does
BrakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
DoorsNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
TrunkNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Parking brakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
HazardNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
SeatbeltNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
Vehicle speedNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
TachNot foundNot yet checked
Not found
Not foundWe found no source for this wire on the 2020 and newer Corolla.
CAN busDataNot yet checked
Black (high)
White (low)
Main body ECU at the dash fuse box, black 30-pin plug, pins 5 and 4From the iDatalink guide for push-button cars and the Hybrid. No source gives CAN wire colors at the OBD port. Never cut or splice them.
Sources: a 2020 Corolla key-sedan wire list on the12volt and the iDatalink guide for 2020 push-button cars. Turn signals, brake, reverse, doors and speed were not found for this body.
Which years share wiring with the 2020 Toyota Corolla?
This page2020The sources behind this page are for 2020.
Same wiring2021 and 2022iDatalink, Fortin and Kleinn each list 2020 to 2022 as one install. The wire rows we could read are for 2020.
Not this page2019 and olderPrevious body, different colors and pins. 2023 and newer are not covered: makers issue separate guides from 2023 and we found no wire source.
Where are the fuse boxes and ground points on a 2020 Toyota Corolla?
InteriorBelow the dash, driver sideP/OUTLET NO.1 fuse 29 (15A), ECU-ACC fuse 13 (5A), OBD fuse 2 (7.5A). The main body ECU is at this fuse box.
Under the hoodEngine bay fuse boxPush the tabs in and lift the lid off.
Ground pointsClean body metalNo named ground point was found. Never use the battery negative post.
Fuse list from a fuse guide for 2019 to 2022 that is not specific to the US sedan. Read the lid label and meter the slot.
Where is the OBD-II port on a 2020 Toyota Corolla?
OBD II
Diagnostic portOBD-II port: location not confirmedLook under the driver side dash first, and send us a photo if you find it.
Common questions about 2020 Toyota Corolla wiring
What wire is constant power on a 2020 Toyota Corolla?
Blue at the steering lock plug (push-button cars), black 7-pin, pin 7. Always hot. Meter it before you tap it.
What wire is ignition on a 2020 Toyota Corolla?
Black at the steering lock plug, black 7-pin, pin 6. Hot in run. Meter it before you tap it.
Where is the CAN bus on a 2020 Toyota Corolla?
Black (high) and White (low) at the main body ECU at the dash fuse box, black 30-pin plug, pins 5 and 4. From the iDatalink guide for push-button cars and the Hybrid.
Which years share wiring with the 2020 Toyota Corolla?
2021 and 2022. iDatalink, Fortin and Kleinn each list 2020 to 2022 as one install.
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 2020 Toyota Corolla 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 2020 Toyota Corolla gets their name here, and it stays here.
★
Every tip we use gets a creditThe wire you checked is marked "Checked on a truck, 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.
