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Which wires give constant, ignition and ground on a 2025 Chevrolet BrightDrop 400 and 600?
On a 2025 Chevrolet BrightDrop 400 and 600, take ignition from the Blue/Violet wire at the blunt-cut upfitter wires in the cab, near the park brake, circuit 10721, 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 2025 Chevrolet BrightDrop 400 and BrightDrop 600 electric vans.
This page is short. The van is electric and has no ignition switch. The wires GM publishes for added equipment are five blunt-cut wires in the cab near the park brake: one ignition wire, two relay control wires and two relay outputs. No constant wire color and no turn, brake, reverse, door or CAN wire was found. Our own team has not yet metered these on a 2025 van.
OBD-II portUnder the driver side dashboard
Best power spotBlunt-cut upfitter wires near the park brake
System voltage12V accessory system, high voltage drive battery
Ignition typeElectric, no ignition switch
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Where do I get constant, ignition and ground on a 2025 Chevrolet BrightDrop 400 and 600?
All five wires are in one blunt-cut bundle in the cab, near the park brake.
Option 1 Ignition
Upfitter ignition wire
One 10 amp fused wire that is live in run mode.
Constant
Not found
Not foundNo constant wire color was found. GM bulletin 188 covers adding a battery feed, but it is pictures only. The relay outputs in option 2 are live only while their relay is switched on.
Ignition
Blue/Violet
Blunt-cut upfitter wires in the cab, near the park brake, circuit 10721GM calls this the 10 amp fused ignition (run mode) circuit. Live with the van on.
Ground
Body ground
Body metal near the deviceClean, bare metal only. GM says equipment ground wires are not provided in this bundle.
From GM. This van has no ignition switch. GM gives this blunt-cut wire as the run power source for added equipment. GM lists these wires under upfitter option code 9L7, so not every van may have them.
Option 2 Relay outputs
Upfitter relay wires
Two relay control inputs and two fused outputs, in the same bundle.
Relay 1 control
Blue/White
Blunt-cut upfitter wires in the cab, near the park brake, circuit 10716Input. You feed 12 volts to this wire to switch relay 1 on. No switch is included.
Output 1
Blue
Blunt-cut upfitter wires in the cab, near the park brake, circuit 10731Relay-controlled output, 30 amp fused, fed from the 12V battery. Listed right after relay 1 in the GM table.
Relay 2 control
Violet/Gray
Blunt-cut upfitter wires in the cab, near the park brake, circuit 10717Input. You feed 12 volts to this wire to switch relay 2 on. No switch is included.
Output 2
Gray/Black
Blunt-cut upfitter wires in the cab, near the park brake, circuit 10732Relay-controlled output, listed right after relay 2 in the GM table. The bulletin says 30 amp in its text and 10 amp in its table, so check the fuse on the van.
From the same GM table. The outputs stay on with the van off for as long as their relay is switched on. GM says the ignition wire can be used to feed the relay control wires when you want an output live only in run mode.
Wire colors and circuit numbers from GM upfitter bulletin 196b (model year 2024 and newer) and the GM BrightDrop upfitter guides for 2025 and 2026, which print the same five wires.
What are the turn signal, reverse and light wires on a 2025 Chevrolet BrightDrop 400 and 600?
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. No lamp wire source was found for this van.
Where are the brake, door, speed and CAN wires on a 2025 Chevrolet BrightDrop 400 and 600?
Circuit
Wire color
Location and what it does
BrakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
DoorsNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Parking brakeNot foundNot yet checked
Not found
Not foundThe parking brake is electric. No wire was found.
HazardNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
SeatbeltNot 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.
CAN busNot foundNot yet checked
Not found
Not foundNo CAN wire color or diagnostic port pin was found. One telematics maker fits this van with a 16-pin T-harness at the diagnostic port. GM says the modules on this van check each other with serial data authentication, and that a tracker left on the diagnostic port may interfere with vehicle systems.
Sources: GM upfitter bulletin 196b, the GM BrightDrop upfitter guides for 2025 and 2026, and the GM owner manuals. Diagnostic port location from one telematics maker's install guide. No source gave a brake, door, parking brake, hazard, seatbelt, speed or CAN wire for this van.
Which years share wiring with the 2025 Chevrolet BrightDrop 400 and 600?
This page2025GM prints an upfitter guide for 2025.
Same wiring2024 and 2026GM bulletin 196b covers model year 2024 and newer, and the 2025 and 2026 GM upfitter guides print the same five wires and circuit numbers.
Not this page2022 EV600 and 2023 Zevo 600No wire color was found for these years. GM bulletin 188 covers them, but it is pictures only.
Where are the fuse boxes and ground points on a 2025 Chevrolet BrightDrop 400 and 600?
InteriorDriver side of the instrument panel, between the steering wheel and the doorThe 2025 owner manual says to take out the screw at the bottom right of the cover with a 7 mm socket. Fuse F15 is named for the upfitter run circuit, and GM shows it as 10 amp.
Under the hoodUnderhood fuse blockOpen the hood and lift off the cover. The fuse label is on the back of the cover. The two upfitter relays are in this block.
Ground pointsClean body metalGM provides no ground wire for added equipment and names no ground point for it.
Fuse block locations from the GM owner manuals for 2023 and 2025. The manuals do not print amp ratings, so read the fuse label on the van. The front power outlet on the lower center stack works only with the van on. Do not tap the gateway, data link or body control fuses.
Where is the OBD-II port on a 2025 Chevrolet BrightDrop 400 and 600?
OBD II
Diagnostic portOBD-II port: under the driver side dashboardPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Common questions about 2025 Chevrolet BrightDrop 400 and 600 wiring
What wire is ignition on a 2025 Chevrolet BrightDrop 400 and 600?
Blue/Violet at the blunt-cut upfitter wires in the cab, near the park brake, circuit 10721. GM calls this the 10 amp fused ignition (run mode) circuit. Meter it before you tap it.
Which years share wiring with the 2025 Chevrolet BrightDrop 400 and 600?
2024 and 2026. GM bulletin 196b covers model year 2024 and newer, and the 2025 and 2026 GM upfitter guides print the same five wires and circuit numbers.
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