Which wires give constant, ignition and ground on a 2026 Hino L6, L7 and L8?
On a 2026 Hino L6, L7 and L8, take constant power from the Blue (printed L-) wire at the telematics connector C, circuit T21, "Power Supply (BAT)", ignition from the Blue/White (printed L-W) wire at the telematics connector C, circuit T26, "Power Supply (Starter switch ON)", and ground to the Brown (printed BR-) wire at the telematics connector C, circuit T25. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
Diagnostic port:Not found in the Hino bookBest power spot:Telematics connector CSystem voltage:12VIgnition type:Ignition switch
Where do I get constant, ignition and ground on a 2026 Hino L6, L7 and L8?
Hino prints a body builder connector for telematics and a second one on the frame. Both are listed here with their circuits.
Option 1 Telematics
Telematics connector C
Built by Hino for added telematics units.
Constant
Blue (printed L-)
Telematics connector C, circuit T21, "Power Supply (BAT)"Hino marks this connector "For Telematics". 2 amps maximum.
Ignition
Blue/White (printed L-W)
Telematics connector C, circuit T26, "Power Supply (Starter switch ON)"Live with the key on. 7 amps maximum, shared with the cab side ignition wire.
Accessory
Blue/Yellow (printed L-Y)
Telematics connector C, circuit T22, "Power Supply (ACC)"Live in the accessory position. 2 amps maximum.
Ground
Brown (printed BR-)
Telematics connector C, circuit T25Ground for the telematics connector.
From Hino's 2026 Body Builder Book, Chapter 7. This is the connector Hino built for telematics, so it is the first choice.
Option 2 Frame
Chassis frame connector G
Body builder power on the frame. Also cab side connector A.
Constant
White (printed W-)
Chassis frame connector G, circuit ST9, Battery power. Also Cab side connector A, circuit AGKUnfused. Put your own fuse and switch in line. 10 amps total across AGK, SX4 and ST9.
From Hino's 2026 Body Builder Book. The chassis frame connector is near the frame rails for body builders. Constant power on these wires is not fused by Hino, so a fuse is required.
Colors are printed with a trailing dash in the Hino book. We read it as a solid color. Meter before you tap.
Where are the turn signal, reverse and light wires on a 2026 Hino L6, L7 and L8 for advanced 360 multicam and video telematics installs?
Chassis frame connector G, circuit SLX, Tail lampLive when the headlight switch is on.
HeadlightPositive +Not yet checked
Red/Green (printed R-G)
Cab side connector A, circuit T1Y, Headlamp outputHeadlamp signal. 0.5 mm wire.
ReversePositive +Not yet checked
Red (printed R-)
Chassis frame connector G, circuit SLY, Back up lampBackup lamp output.
Dome lightNot foundNot yet checked
Not found
Not foundThe Hino book does not list this wire.
Each chip shows the main insulation color with its stripe. Source: Hino's 2026 Body Builder Book, Chapter 7 connector tables.
Where are the brake, door, speed and CAN wires on a 2026 Hino L6, L7 and L8 for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Red (printed R-)
Chassis frame connector G, circuit SM3, Right stop lampOnly the right stop lamp is printed. No left stop lamp row was found.
DoorsNot foundNot yet checked
Not found
Not foundThe Hino book does not list this wire.
Parking brakeNot foundNot yet checked
Not found
Not foundThe Hino book does not list this wire.
HazardNot foundNot yet checked
Not found
Not foundThe Hino book does not list this wire.
Vehicle speedPositive +Not yet checked
Yellow (printed Y-)
Cab side connector A, circuit I0MSpeed pulse, 8 pulses. 0.5 mm wire.
Engine start signalPositive +Not yet checked
White (printed W-)
Cab side connector A, circuit AT6Start signal. 0.5 mm wire.
TachometerPositive +Not yet checked
Blue (printed L-)
Cab side connector A, circuit SY7Engine tachometer signal. 0.5 mm wire.
PTO enablePositive +Not yet checked
Green/White (printed G-W)
Cab side connector A, circuit A6QPTO enable. 0.5 mm wire.
J1939 dataDataNot yet checked
Yellow (+)
Green (-)
Telematics connector C: T24 CAN Hi (Yellow), T2Z CAN Lo (Green). Body builder CAN connector D: SY8 Hi, SY9 LoHino names connector D the body builder CAN and refers to J1939-15 with a termination resistor. Do not remove it.
Sources: Hino 2026 Body Builder Book (BM2419B6CAN) and the 2026 heavy duty book (BM2421B6CAN), Chapter 7. Doors, parking brake, hazard and dome light were not printed. Only a right stop lamp is listed. The diagnostic port location is not in this book.
Where are the fuse boxes and ground points on a 2026 Hino L6, L7 and L8?
Ground pointsChassis frame connector G, circuits SX6 to SX8
Fuse boxesNot foundCab fuse box location is not described in the chapter we read.
Go by the fuse label on the truck.
Where is the diagnostic port on a 2026 Hino L6, L7 and L8?
OBD II
Diagnostic portOBD-II port: not found in the Hino bookPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2026 Hino L6, L7 and L8?
This page2026L6, L7 and L8.
Same wiringXL7 and XL8, 2026Hino's 2026 heavy duty book prints the same connector A, C, D and G circuits and colors.
Not this page2025 and olderBoth books we read cover model year 2026 only.
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This page covers the 2026 Hino L6, L7 and L8 conventional trucks.
Every wire here is from the Hino 2026 Body Builder Book. Hino's separate 2026 heavy duty book for the XL7 and XL8 prints the same connector circuits and colors. Our own team has not yet metered these on a 2026 truck.
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 2026 Hino L6, L7 and L8 wiring
What wire is constant power on a 2026 Hino L6, L7 and L8?
Blue (printed L-) at the telematics connector C, circuit T21, "Power Supply (BAT)". Hino marks this connector "For Telematics". Meter it before you tap it.
What wire is ignition on a 2026 Hino L6, L7 and L8?
Blue/White (printed L-W) at the telematics connector C, circuit T26, "Power Supply (Starter switch ON)". Live with the key on. Meter it before you tap it.
Where is the reverse wire on a 2026 Hino L6, L7 and L8?
Red (printed R-) (positive +) at the chassis frame connector G, circuit SLY, Back up lamp. Backup lamp output. Meter it before you tap it.
Where is the brake wire on a 2026 Hino L6, L7 and L8?
Red (printed R-) (positive +) at the chassis frame connector G, circuit SM3, Right stop lamp. Only the right stop lamp is printed. Meter it before you tap it.
Where is the vehicle speed signal on a 2026 Hino L6, L7 and L8?
Yellow (printed Y-) (positive +) at the cab side connector A, circuit I0M. Speed pulse, 8 pulses. Meter it before you tap it.
Which years share wiring with the 2026 Hino L6, L7 and L8?
XL7 and XL8, 2026. Hino's 2026 heavy duty book prints the same connector A, C, D and G circuits and colors.
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Had the panels off on one of these? Show the next installer what you found.
No one has sent photos for the 2026 Hino L6, L7 and L8 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
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Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2026 Hino L6, L7 and L8 gets their name here, and it stays here.
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