Mercedes-Benz and Freightliner. Cargo, passenger and cab chassis.
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Which wires give constant, ignition and ground on a 2024 Mercedes-Benz Sprinter (VS30)?
On a 2024 Mercedes-Benz Sprinter (VS30), take constant power from the seat-base fuse box F55, fuse 16 (25A) or fuse 24 (15A) (wire color not published), ignition from the Gray/White (gr/ws) wire at the fuse box in the front passenger footwell, "key hot" wire, and ground to the Brown wire at the EA5 plug under the driver seat box, pin 8. 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 2024 Mercedes-Benz Sprinter (VS30): cargo van, passenger van and cab chassis. Mercedes publishes very few wire colors for this van and asks upfitters to use its PSM module and body builder fuses.
Mercedes' 2019 bulletin covers this year for the EA5 lock and door plug. The rest of the page gives PSM pins, which Mercedes publishes without colors. Our own team has not yet metered these on a 2024 van, and each row says so.
OBD-II portLocation not confirmed (US)
Best power spotBody builder fuses, seat base
System voltage12V
Ignition typeKey or push-button
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Where do I get constant, ignition and ground on a 2024 Mercedes-Benz Sprinter (VS30)?
Take constant, ignition and ground from the same area. Mercedes wants added equipment powered from its body builder fuses and signals taken from its PSM module, not spliced into the van's harness.
Option 1 Fuses and plugs
Seat base and footwell fuse boxes
Body builder fuses in the driver seat base, and the fuse box in the front passenger footwell.
Constant
Color not published
Seat-base fuse box F55, fuse 16 (25A) or fuse 24 (15A)Mercedes' fuse chart lists these for the body builder terminal strip. Wire colors not published.
Ignition
Gray/White (gr/ws)
Fuse box in the front passenger footwell, "key hot" wireHot with the key on. From an installer light bar guide for the VS30 (years not stated); it warns some vans are colored differently. Meter it.
Ground
Brown
EA5 plug under the driver seat box, pin 8Ground (circuit 31). Mercedes' MY2019 central locking bulletin (EA5 plug).
Mercedes also lists footwell fuse MF1 (5A) as a terminal 15 signal for the body builder.
Option 2 Mercedes PSM
PSM module
Parameterizable special module, driver seat box, on vans ordered with it.
Signals
Pins only
PSM module (option ED5) in the driver seat boxMercedes' approved signal source. With the Work Truck program: Plug 1 pin 7 ignition, pin 2 accessory (15R), pin 14 reverse. Mercedes prints pins, not wire colors, and the program must be loaded by a dealer or certified upfitter.
Different PSM programs (Work Truck, Fleet, RV) put different signals on the same pins.
Colors from Mercedes' MY2019 central locking bulletin (EA5 plug) (OEM) and an installer guide for the VS30. Fuse numbers from Mercedes' 2021 fuse chart.
What are the turn signal, reverse and light wires on a 2024 Mercedes-Benz Sprinter (VS30)?
Circuit
Wire color
Location and what it does
Left turnNot foundNot yet checked
Not found
PSM Fleet program: plug 2, pin 20No wire colors found for the VS30. Mercedes' route is the PSM module.
Right turnNot foundNot yet checked
Not found
PSM Fleet program: plug 2, pin 21No wire colors found for the VS30. Mercedes' route is the PSM module.
Park lightNot foundNot yet checked
Not found
Not foundNo wire colors found for the VS30. Mercedes' route is the PSM module.
HeadlightNot foundNot yet checked
Not found
Not foundNo wire colors found for the VS30. Mercedes' route is the PSM module.
ReverseNot foundNot yet checked
Not found
PSM Work Truck program: plug 1, pin 14Positive, 5A, from the PSM. Mercedes' tail light bulletin prints its pin table as a picture.
Dome lightNot foundNot yet checked
Not found
Not foundNo wire colors found for the VS30. Mercedes' route is the PSM module.
Each chip shows the main insulation color with its stripe. Most VS30 signal wires are published only as PSM module pins.
Where are the brake, door, speed and CAN wires on a 2024 Mercedes-Benz Sprinter (VS30)?
Circuit
Wire color
Location and what it does
BrakeNot foundNot yet checked
Not found
PSM Work Truck program: plug 2, pin 19Negative, 0.5A, from the PSM. No vehicle wire color found.
Lock / unlockPolarity: meter itNot yet checked
Blue/Black (lock)
Blue/Brown (unlock)
EA5 plug under the driver seat box, pin 2 (lock) and pin 1 (unlock)Mercedes' MY2019 central locking bulletin (EA5 plug). Mercedes does not state polarity.
Side and rear doorsPolarity: meter itNot yet checked
Yellow/Black (left side)
Yellow/White (right side)
Blue/Green (rear door)
EA5 plug, pin 6 (left side door), pin 7 (right side door), pin 5 (rear door latch)Door latch signals. Mercedes does not state polarity.
Driver doorNot foundNot yet checked
Not found
PSM Work Truck program: plug 1, pin 6Driver door signal from the PSM. No vehicle wire color found.
Parking brakeNot foundNot yet checked
Not found
PSM Work Truck program: plug 2, pin 18Negative, 1A, from the PSM.
Vehicle speedNot foundNot yet checked
Not found
PSM Work Truck program: plug 2, pin 22The PSM gives an on/off "moving" signal, not a pulse speed wire. No pulse speed or tach wire found.
CAN busDataNot yet checked
Brown
Brown/Red
Front SAM white plug, pins 7 and 17; also a distribution block at the top left of the passenger fuse boxFrom Mid City install guides (aftermarket, 2019 to 2024). Which is high and low is not stated. Mercedes says not to connect to the CAN bus; use the PSM.
Sources: Mercedes-Benz Vans upfitter bulletins (EA5 central locking plug, PSM module, PSM Work Truck and MY25 specifications), Mercedes' 2021 fuse chart, an installer light bar guide for the VS30, and Mid City install guides. Constant, turn, park, headlight, reverse, dome, brake, pulse speed and tach wire colors were not found; see each row.
Which years share wiring with the 2024 Mercedes-Benz Sprinter (VS30)?
This page2024Mercedes' 2019-and-newer EA5 bulletin.
Same wiring2019, 2020, 2021, 2022, 2023, 2025 and 2026One generation (VS30). Mercedes' EA5 bulletin covers 2019 and newer; 2025 brought a new PSM module and connectors.
Not this page2018 and olderThe 2007 to 2018 Sprinter (NCV3) uses different colors and has its own pages.
Where are the fuse boxes and ground points on a 2024 Mercedes-Benz Sprinter (VS30)?
Driver seat baseBody builder fusesFuse 16 (25A) and fuse 24 (15A) feed the body builder terminal strip; fuses 14 and 15 (25A) feed the PSM. From Mercedes' 2021 fuse chart.
Passenger footwellFootwell fuse boxFuse MF1 (5A) terminal 15 for the body builder, fuse 19 (10A), and diagnostics fuse 53 (5A).
Ground pointsA-pillar ground boltAn install guide uses the A-pillar ground bolt. EA5 pin 8 is a Brown ground. Never use the battery negative post.
Fuses from Mercedes' 2021 fuse chart. Our team has not yet checked them on a van.
Where is the OBD-II port on a 2024 Mercedes-Benz Sprinter (VS30)?
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 2024 Mercedes-Benz Sprinter (VS30) wiring
What wire is ignition on a 2024 Mercedes-Benz Sprinter (VS30)?
Gray/White (gr/ws) at the fuse box in the front passenger footwell, "key hot" wire. Hot with the key on. Meter it before you tap it.
Where is the reverse wire on a 2024 Mercedes-Benz Sprinter (VS30)?
The wire color is not published. It is at the PSM Work Truck program: plug 1, pin 14. Positive, 5A, from the PSM. Meter it before you tap it.
Where is the brake wire on a 2024 Mercedes-Benz Sprinter (VS30)?
The wire color is not published. It is at the PSM Work Truck program: plug 2, pin 19. Negative, 0.5A, from the PSM. Meter it before you tap it.
Where is the parking brake wire on a 2024 Mercedes-Benz Sprinter (VS30)?
The wire color is not published. It is at the PSM Work Truck program: plug 2, pin 18. Negative, 1A, from the PSM. Meter it before you tap it.
Where is the vehicle speed signal on a 2024 Mercedes-Benz Sprinter (VS30)?
The wire color is not published. It is at the PSM Work Truck program: plug 2, pin 22. The PSM gives an on/off "moving" signal, not a pulse speed wire. Meter it before you tap it.
Where is the CAN bus on a 2024 Mercedes-Benz Sprinter (VS30)?
Brown and Brown/Red at the front SAM white plug, pins 7 and 17; also a distribution block at the top left of the passenger fuse box. From Mid City install guides (aftermarket, 2019 to 2024).
Which years share wiring with the 2024 Mercedes-Benz Sprinter (VS30)?
2019, 2020, 2021, 2022, 2023, 2025 and 2026. One generation (VS30).
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