MAN TG3 Signal Horn Wiring Diagrams – Standard Horn, Two-Tone Horn, Air Horn Solenoid & CAN Control

This technical wiring manual contains the complete electrical schematics for the signal horn systems used in MAN TG3 trucks.

The diagrams include the full control architecture for standard signal horns, two-tone horn variants, compressed-air horn solenoid activation, steering column horn switch routing, CAN communication networks and electrical supply connections.

All circuits include connector identifiers, system references and grounding architecture required for professional diagnostics, repair or horn system troubleshooting.

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Signal Horn System Components

• Standard signal horn (H142)

• Two-tone signal horn (H143)

• Horn selection switch (S160.1)

• Steering column wrap spring (A1135)

• Compressed-air horn solenoid valve (Y299.1)

These components form the vehicle acoustic warning system and allow switching between different horn types.

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Electronic Control Modules and CAN Routing

• RIO control module (A1358.1)

• EIO1 control module (A1361.1)

• CVM control module (A1363.2)

• CAN I-CAN communication routing

• Control feedback and signal switching lines

The horn system communicates with vehicle control modules through CAN networks for user input processing and system monitoring.

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Electrical Supply and Switch Routing

• Steering column horn switch wiring

• Wrap spring signal routing to control modules

• Electrical supply from central system

• Ground network routing for horn circuits

These circuits allow reliable horn activation and signal routing through the vehicle steering interface.

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Wiring Harness Interfaces

• Steering column connector interface

• Cab-frame connector routing

• Front cab cut-off connectors

• Rear cab cut-off connectors

These harness references allow full diagnostic tracing of horn electrical circuits and wiring paths.

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Diagnostic Use Cases

• horn not working

• two-tone horn switching failure

• compressed-air horn not activating

• steering column horn switch malfunction

• CAN communication horn errors

• electrical supply or grounding faults

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Compatible Vehicles

• TGX

• TGS

• TGM

• TGL

MAN TG3 platform trucks equipped with standard or compressed-air horn systems.

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Technical Highlights

• Complete OEM signal horn wiring diagrams

• Standard and two-tone horn circuits included

• Air horn solenoid control wiring included

• CAN communication routing shown

• Steering column switch routing included

• Full harness routing references included

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Table of Content

Signal Horn System

• Standard horn wiring

• Two-tone horn wiring

• Air horn solenoid control

Driver Control Interface

• Steering column horn switch

• Wrap spring routing

• Signal selection switch

Electronic Communication

• CVM CAN routing

• EIO1 communication wiring

• RIO signal interfaces

Electrical Infrastructure

• Central electrical system supply

• Ground network routing

• Signal feed wiring

Wiring Harness Interfaces

• Steering column connectors

• Cab-frame connectors

• Cab cut-off connectors

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