Identify an added horn control with the CH4X4 Train Horn Symbol momentary push switch for Toyota train horn applications. The engraved legend distinguishes this control from other dashboard accessories, while the matte black face maintains a factory look in a suitable Large Push opening.
Train Horn Symbol: control the input, not the horn load
The button operates as a momentary SPST ON/OFF switch. Press and hold for ON, then release for OFF; it does not latch. Route the accessory load through a fused relay and confirm the horn system’s control requirements before installation. This switch is not a horn, compressor or air-control assembly.
Package contents
- 1 CH4X4 Large Push momentary switch — Train Horn Symbol.
- 1 connector with cable.
- Wiring diagram supplied with the switch.
Relay and controlled equipment sold separately.
Momentary push switch for Toyota train horn: Large Push specifications
- Face dimensions: 39 × 21 mm (approximately 1.54 × 0.83 inches). Verify the mounting opening separately.
- Single Pole Single Throw (SPST), momentary ON/OFF operation: press and hold for ON; release for OFF.
- Electronic switch rated at 3A at 12V, with short circuit protection.
- Heavy-duty ABS body with a matte black hard surface.
- Train Horn Symbol legend laser etched directly into the face.
- Two LEDs per switch: one upper indicator and one lower panel light.
- Upper LED turns ON when the switch is pressed IN.
- Lower LED can be wired to a separate dash-light circuit.
Wiring and installation — fused relay required
A fused relay is required in ALL installations. Do not power the accessory directly through this 3A, 12V switch. Route accessory power through a suitably rated relay circuit with appropriate fuse protection.
Follow the supplied wiring diagram and the accessory manufacturer’s instructions. The connector and cable provide the switch-side connection. The CH4X4 marine-grade waterproof 12V 40A relay with 4-pin harness is available separately. Have your installer confirm relay, wiring and fuse selection for the accessory load.
Planning your Train Horn Symbol installation
Plan the switch location around the actual dashboard opening and the fitment restrictions below. The listed face size is 39 × 21 mm, which should not be treated as a panel-cutout specification. Match the connector wiring to the supplied diagram and have the installer check the separate horn system’s instructions.
Compatible with Toyota mounting applications
Check the vehicle year, trim, market and actual dash opening. Observe the mounting-position restrictions below. This CH4X4 aftermarket switch is designed for the listed Toyota applications.
- Toyota Tacoma 2005–2011
- Toyota Tacoma 2012–2015 (left side ONLY)
- Toyota Tacoma 2016–2020 (left side ONLY)
- Toyota FJ Cruiser 2007–2014
- Toyota Fortuner 2005–2014
- Toyota Hilux 2005–2014
- Toyota Highlander 2001–2007
- Toyota Tundra 2005–2006 (center console, if equipped)
- Toyota 4Runner 2003–2009
- Toyota Prado 120 Series 2003–2009
- Toyota Land Cruiser 100 Series 1998–2007
- Toyota Land Cruiser 75, 76, 78 and 79 Series




