15-PIN connector connection scheme

ISO 12098 15-PIN connector wiring diagram (24V truck & semi-trailer)

This wiring diagram shows the pin assignment of a 15-PIN ISO 12098 connector (24V), as used in trucks and semi-trailers. The scheme is used for lighting, auxiliary functions and return circuits within vehicle and semi-trailer wiring.

1. Flashing light left
2. Flashing light right
3. Rear fog light
4. Mass
5. Rear, contour, width and licence plate lights left
6. Right rear, contour, width and licence plate lights
7. Brake lights
8. Reversing lights
9. Constant power supply (+24 V)
10. Sensor for brake lining wear
11. Spring-loaded brake indication
12. Aslift function
13. Mass for data cables
14. CAN H
15. CAN L

Furtherexplanation of the 15-PIN connector according to ISO 12098

The ISO 12098 connector provides a standard 24V connection for lighting and auxiliary functions between truck and semi-trailer. The connector replaces the 7-PIN connectors N and S with one connector, providing a clear connection for lighting in semi-trailer construction.

Electric test and the 15-PIN connector

With the rise of electric trucks and heavy electric vehicles (e-trucks), the 15-PIN connector according to ISO 12098 remains the standard for reliable communication between vehicle and semi-trailer.

Nevertheless, there are a few points of interest in practice:

• Not every electric tractor activates all pin functions automatically
• Power supply via PIN 15 (ignition switched) is not always available with EVs
• LED lighting in combination with a 24V CAN-bus system often requires specific adapters or resistor modules

Related articles

• 7-PIN connector (24V, ISO 1185).
• 7-PIN connector (24V, ISO 3731).
• 13-PIN connector (ISO 11446).
• CAN-bus solutions for LED lighting
• Lighting for agricultural vehicles
• Lighting for agricultural implements
• 24 v lighting for semi-trailer construction