F-250, F-350 and F-450 pickups and F-350 to F-600 chassis cabs. 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 2026 Ford Super Duty?
On a 2026 Ford Super Duty, take constant power from the Brown/Red wire at the upfitter relay box, engine bay passenger side and ignition from the Brown/Blue wire at the SEIC/PTO customer access connector behind the passenger kick panel, pin 17, 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 2026 Ford Super Duty pickups and chassis cabs. For 2026 Ford moved to a new upfitter system it calls Vehicle Integration System 2.0, with more vehicle signals over the data bus, so the upfitter wiring may have changed.
The pin data on this page comes from Ford's 2023 Body Builder book and has not been confirmed for 2026. Treat every row as a starting point and meter it. Our own team has not yet metered these on a 2026 truck, and each row says so.
OBD-II portDriver dash (location not confirmed)
Best power spotPassenger kick panel
System voltage12V (diesel: 2 batteries)
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 2026 Ford Super Duty?
Take constant, ignition and ground from the same area. On this truck Ford's own run/start wire sits in a customer access connector behind the passenger kick panel, and Ford's battery-hot and run/start upfit wires are at the upfitter relay box under the hood.
Option 1 Easiest in the cab
Passenger kick panel
Ford's SEIC/PTO customer access connector with a bare-wire pigtail, right side of the passenger footwell. Standard on every Super Duty.
Constant
Not found
No cab constant wire foundFord does not list one in the cab. Meter a fuse slot with the key off and use a fuse tap. Ford's battery-hot upfit wire is in the engine bay (Option 2).
Ignition
Brown/Blue
SEIC/PTO customer access connector behind the passenger kick panel, pin 17Ford run/start output, 5A fuse. Standard on every truck, key or push-button. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book.
Ground
Body ground
Body metal in the passenger kick areaClean, bare metal only. Never the battery negative post.
The run/start wire is on a 5A fuse. Use it as the ignition sense wire, not to power a large load.
Option 2 Ford upfit wires
Upfitter relay box, under the hood
Engine bay, passenger side. Bare wires behind the box. Ford runs four pass-through wires through the dash to reach the cab.
Constant
Brown/Red
Upfitter relay box, engine bay passenger sideFord battery-hot output SB106, fuse F6, 20A. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book.
Ignition
Brown
Upfitter relay box, engine bay passenger sideFord run/start output CB111, fuse F3, 20A. The same book also draws it Brown/White, so meter it.
Ground
Black/Violet
Ford ground point G131The upfitter relay box ground. Ford also shows Black/Gray on this ground.
Pass-through wires (bare both ends, cab end behind the passenger kick): Brown/Blue, White, White/Orange and Gray/Orange.
All power wires from Ford's 2023 Body Builder book (Ford Body Builder Advisory Service), which we read in full. Ford's book disagrees with itself on a few colors, and each row says so.
What are the turn signal, reverse and light wires on a 2026 Ford Super Duty?
Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Front: not found
Gray/Blue (rear, pickup)
Rear: separate turn circuit CLS23 at the rear of the frame, pickupsFord's pickup box removal bulletin shows different colors at the frame connectors (Gray/Yellow on C408 pin 6), so meter it. Ford lists the circuits (left CLS21, right CLS25) at the snowplow connector, but no colors.
Right turnPositive +Not yet checked
Front: not found
Green/White (rear, pickup)
Rear: separate turn circuit CLS27 at the rear of the frame, pickupsGreen/White is also the neutral wire and a PTO wire in the cab, so go by location.
Park lightPositive +Not yet checked
Blue/White
Tail lamp plug, or frame connector C408 pin 29 at the end of the left frame railInstaller-reported on a 2024 F-250 (both tail lamps), and Ford's pickup box bulletin agrees on C408. The left side circuit at C408 pin 28 is Blue/Green.
HeadlightNot foundNot yet checked
Not found
Snowplow/headlamp connector C11: low beams on cavities 5 and 6Ford gives circuit numbers only (CLF04, CLF05), no colors.
ReversePositive +Not yet checked
Gray/Brown
Ford's body builder backup lamp feed at the rear of the frame, or the 7-way trailer plugFord's backup lamp feed for bodies and trailers, 10A. On a 2024 truck with LED tail lamps an installer found no reverse wire at the lamp, and tapped the 7-way plug instead.
Dome lightNot foundNot yet checked
Not found
Not foundNo source gives the dome wire for this generation.
Each chip shows the main insulation color with its stripe. Source: Ford's 2023 Body Builder book and bulletins, carried to 2026.
Where are the brake, door, speed and CAN wires on a 2026 Ford Super Duty?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Violet/White
Customer access connector behind the passenger kick panel, pin 16Ford brake and third brake light output for aftermarket equipment. Use it as a sense input only. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book.
Third brake lightPositive +Not yet checked
Violet/White
Bare wire taped at the left rear of the frameFord circuit CCB08, 5A limit, for bodies that need a third brake light.
DoorsNot foundNot yet checked
Not found
Not foundNo source gives the door wires for this generation.
Parking brakeNot foundNot yet checked
Not found
No wireFord says there is no wired parking brake output on these trucks. It is only on the J1939 data bus at the upfitter module.
Vehicle speedAC signalNot yet checked
Violet/Orange
Customer access connector, pin 10Ford circuit VMC05, 2.22 pulses per second per mph. Ford says it needs a 500 ohm pull-up to run/start. Violet/Orange is also upfitter relay 2, so go by location. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book.
TachAC signalNot yet checked
Blue/Green
Customer access connector, pin 9Clean tach output. Frequency is RPM times cylinders divided by 120. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book.
In ParkNegative -Not yet checked
Gray/Brown (Park)
Green/White (Neutral)
Customer access connector, pin 13 park, pin 14 neutralSwitch to ground, 160mA max. Ford says to add a 680 ohm pull-up. From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book. A 2024 owner reports two Yellow/Green wires on pins 7 and 14 at the engine bay SEIC plug, which does not match the 2023 book.
Upfitter switchesPositive +Not yet checked
Brown/Green (relay 1, 25A)
Violet/Orange (relay 2, 25A)
Blue/Green (relay 3, 25A)
Gray/Brown (relay 4, 25A)
Brown/Yellow (relay 5, 40A)
Gray/Orange (relay 6, 40A)
Bare wires behind the upfitter relay box, engine bay passenger sideTrucks with the six factory switches in the overhead console (option 66S). From Ford's 2023 Body Builder book, carried to 2026; we did not find the 2026 book. One owner lists different colors on 2023 to 2024 trucks, so read the harness label and meter.
CAN busDataNot yet checked
Green/Blue (J1939 +)
Gray/Blue (J1939 -)
Upfitter integration module behind the glove box, black 20-way, pin 3 and pin 4Ford says the vehicle CAN is encrypted on these trucks. J1939 at this module is Ford's approved read access, standard on chassis cabs and option 18A on pickups. Never cut or splice it.
Sources: Ford's 2023 Super Duty Body Builders Layout Book (customer access, upfitter, fuses, lighting feeds), Ford bulletins Q-356 (pickup box removal lighting) and Q-358 (upfitter integration module, J1939), Ford service message SSM 53201, Ford's 2023 and 2024 remote start install sheets (gateway location), and installer reports from 2024 trucks. Front turn, headlight, dome, door and hazard wires were not found.
Which years share wiring with the 2026 Ford Super Duty?
This page2026Carried from Ford's 2023 book, not confirmed. Ford changed the upfitter system for 2026.
Same generation2023, 2024 and 2025Ford's 2023 book is the only full source. Ford's pickup box removal bulletin covers 2023 to 2025, its fast-flash service message covers 2023 and 2024, and fuse listings treat 2023 to 2026 as one layout. For 2026 Ford moved to a new upfitter system (VIS 2.0), so 2026 may differ.
Not this page2022 and older2017 to 2022 trucks have a different body module, a gateway at the OBD port and different customer access pins. Those years have their own pages.
Where are the fuse boxes and ground points on a 2026 Ford Super Duty?
InteriorCab fuse panelFrom Ford's 2023 book: fuse 7 (10A) brake switch, 12 (7.5A) OBD and smart data link, 22 (5A) upfitter switches, 30 (5A) brake output to trailer brake and customer access, 34 (30A) run/start relay.
Under the hoodEngine bay fuse boxFuse 3 (200A) feeds the upfitter relays, 58 and 101 (50A) the customer interface modules, 74 (30A) trailer brake, 76 (25A) trailer charge, 107 (25A) trailer park lamps, 21 (10A) trailer backup lamps.
Ground pointsG131 and body metalFord grounds the upfitter box and upfitter module at ground point G131. For a GPS or camera, use clean, bare body metal, never the battery negative post. Diesels have two batteries.
Fuse numbers from Ford's 2023 book, carried to 2026. A fuse-diagram site (lower trust) shows the same layout. Our team has not yet checked them on a truck.
Where is the OBD-II port on a 2026 Ford Super Duty?
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 2026 Ford Super Duty wiring
What wire is constant power on a 2026 Ford Super Duty?
Brown/Red at the upfitter relay box, engine bay passenger side. Ford battery-hot output SB106, fuse F6, 20A. Meter it before you tap it.
What wire is ignition on a 2026 Ford Super Duty?
Brown/Blue at the SEIC/PTO customer access connector behind the passenger kick panel, pin 17. Ford run/start output, 5A fuse. Meter it before you tap it.
Where is the reverse wire on a 2026 Ford Super Duty?
Gray/Brown (positive +) at Ford's body builder backup lamp feed at the rear of the frame, or the 7-way trailer plug. Ford's backup lamp feed for bodies and trailers, 10A. Meter it before you tap it.
Where is the brake wire on a 2026 Ford Super Duty?
Violet/White (positive +) at the customer access connector behind the passenger kick panel, pin 16. Ford brake and third brake light output for aftermarket equipment. Meter it before you tap it.
Where is the parking brake wire on a 2026 Ford Super Duty?
The wire color is not published. It is at the no wire. Ford says there is no wired parking brake output on these trucks. Meter it before you tap it.
Where is the vehicle speed signal on a 2026 Ford Super Duty?
Violet/Orange at the customer access connector, pin 10. Ford circuit VMC05, 2.22 pulses per second per mph. Meter it before you tap it.
Which years share wiring with the 2026 Ford Super Duty?
2023, 2024 and 2025. Ford's 2023 book is the only full source.
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 2026 Ford Super Duty 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 2026 Ford Super Duty 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.
