Which wires give constant, ignition and ground on a 2021 Ford Transit?
On a 2021 Ford Transit, take constant power from the Gray/Red wire at the gateway module plug behind the OBD-II port, black 24-pin, driver side of the dash, ignition from the Brown/Yellow wire at the ignition switch plug on the steering column (trucks without keyless entry), and ground to the Black/Purple wire at the gateway module plug behind the OBD-II port, black 24-pin, driver side of the dash. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
OBD-II port:Driver side of the dashBest power spot:Gateway plug behind the OBD-II portSystem voltage:12VIgnition type:Key (this page)
Where do I get constant, ignition and ground on a 2021 Ford Transit?
Take constant, ignition and ground from the same area.
Option 1 Constant and ground
Gateway module plug
Black 24-pin plug on the gateway module behind the OBD-II port, driver side of the dash.
Constant
Gray/Red
Gateway module plug behind the OBD-II port, black 24-pin, driver side of the dashAlways hot, 12V. Two Fortin guides agree.
Ground
Black/Purple
Gateway module plug behind the OBD-II port, black 24-pin, driver side of the dashGround at the same plug.
Ignition
Brown/Yellow
Ignition switch plug on the steering column (trucks without keyless entry)Hot in run and start. From Fortin's guide for 2020 and 2021 trucks without keyless entry. Purple/Green is accessory and Blue/White is the starter on the same plug.
Colors from Fortin. The guide does not tie a pin number to each color, so find the color and meter it.
Option 2 Ford upfitter feed
C33-E customer connector
10-way plug at the driver seat pedestal, on vans built after November 2019.
Ignition
Color not printed
Ford customer connector C33-E, 10-way, at the driver seat pedestal, pin 6Ford's ignition feed for upfitters, 10A, hot in accessory and run, off during crank. Ford prints the pin, not the color.
Constant
Color not printed
Ford customer connector C33-E, 10-way, at the driver seat pedestal, pin 8Battery guard feed, 15A. Ford prints the pin, not the color.
Ground
Color not printed
Ford customer connector C33-E, 10-way, at the driver seat pedestal, pin 1Ground.
Pins from Ford's Transit body builder manual (2023 edition). Pin 2 is an engine-run output (switches to ground, 250mA) and pin 5 is vehicle speed (2.2 Hz per mph).
From Fortin's install guides for the 2020 to 2023 Transit with a standard key and Ford's Transit body and equipment mounting manual.
Where are the turn signal, reverse and light wires on a 2021 Ford Transit 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 2020 to 2023 Transit with a standard key.
Where are the brake, door, speed and CAN wires on a 2021 Ford Transit for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
BrakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
DoorsNegative -Not yet checked
Green/Purple (driver door)
Body module, per Fortin's guide for 2020 and 2021 vans without keyless entryDriver door pin. Meter it before you use it.
Parking brakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
HazardNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedPolarity: meter itNot yet checked
Color not printed
Ford customer connector C33-E, 10-way, at the driver seat pedestal, pin 5Ford speed output, 2.2 Hz per mph.
StarterPositive +Not yet checked
Blue/White
Ignition switch plug on the steering column (trucks without keyless entry)Hot only while cranking. Not a power source.
CAN dataDataNot yet checked
Gray/Orange (CAN 1 high)
Purple/Orange (CAN 1 low)
Blue (CAN 2 high)
White (CAN 2 low)
Gateway module plug behind the OBD-II port, black 24-pin, driver side of the dashTwo CAN pairs at the gateway plug. Use a plug-in harness. Never cut or splice the CAN wires.
Sources: Fortin's install guides for the 2020 to 2023 Transit with a standard key and Ford's Transit body and equipment mounting manual. Turn, park, headlight, reverse, dome, brake, parking brake and hazard wires were not found.
Where are the fuse boxes and ground points on a 2021 Ford Transit?
Customer powerDriver seat pedestalFord customer connector C33-E (10-way) and the CCP1 (60A always on) and CCP2 (175A) power points, per Ford's manual.
Gateway moduleBehind the OBD-II port, driver side of the dashBlack 24-pin plug, per Fortin.
Ground pointsC33-E pin 1, or the Black/Purple wire at the gateway plugOr clean body metal. Never the battery negative post.
From Ford's Transit body and equipment mounting manual (2023 edition) and Fortin's guides.
Where is the OBD-II port on a 2021 Ford Transit?
OBD II
Diagnostic portOBD-II port: driver side of the dashPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2021 Ford Transit?
This page2021Transit with a standard key and the 4-inch display.
Same wiring2020, 2022, 2023Fortin uses one guide for the 2020 to 2024 key vans with keyless entry, and the gateway colors match its 2020 and 2021 guide for vans without keyless.
Not this page2019 and older, 12-inch display and push-button vansThe 12-inch display and push-button vans have the gateway behind the glove box and are not covered here.
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This page covers the 2021 Ford Transit van with a standard key and the 4-inch display. The 2020 Transit has a new electrical system, so 2019 colors do not carry over.
The wire colors come from Fortin's install guides, read wire by wire, and the customer connector pins come from Ford's body builder manual. Our own team has not yet metered these on a 2021 van.
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.
Common questions about 2021 Ford Transit wiring
What wire is constant power on a 2021 Ford Transit?
Gray/Red at the gateway module plug behind the OBD-II port, black 24-pin, driver side of the dash. Always hot, 12V. Meter it before you tap it.
What wire is ignition on a 2021 Ford Transit?
Brown/Yellow at the ignition switch plug on the steering column (trucks without keyless entry). Hot in run and start. Meter it before you tap it.
Where is the vehicle speed signal on a 2021 Ford Transit?
The wire color is not published. It is at Ford customer connector C33-E, 10-way, at the driver seat pedestal, pin 5. Ford speed output, 2.2 Hz per mph. Meter it before you tap it.
Which years share wiring with the 2021 Ford Transit?
2020, 2022, 2023. Fortin uses one guide for the 2020 to 2024 key vans with keyless entry, and the gateway colors match its 2020 and 2021 guide for vans without keyless.
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 2021 Ford Transit 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 2021 Ford Transit 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 truck, compliments of" you.
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