Compatibility:
• Designed for select Toyota and Lexus vehicles equipped with factory amplified systems (JBL, Mark Levinson, or Premium Audio)
• Works with PAC AmpPRO modules: AP4-TY11 and AP4-TY12
• Fits a wide range of models from approximately 2012-2021, depending on trim level and audio package
Main Features:
• Provides access to all factory speaker-level outputs at amplifier location
• Plug-and-play installation — no cutting or splicing of OEM wiring
• Maintains factory wiring integrity for reversible installation
• Includes both male and female connectors
• Harness length: 18″
• Color-coded wires following standard EIA polarity conventions
Typical Wire Configuration:
• White (+) / White-Black (–): Front Left Speaker
• Gray (+) / Gray-Black (–): Front Right Speaker
• Green (+) / Green-Black (–): Rear Left Speaker
• Purple (+) / Purple-Black (–): Rear Right Speaker
• Blue (+) / Blue-Black (–): Subwoofer Output
• Black: Ground Pass-Through
• Yellow: Constant 12 V Pass-Through
Installation Notes:
• Connects directly to the factory amplifier harness — no modification required
• Use with AP4-TY11 or AP4-TY12 for RCA preouts and DSP integration
• Verify polarity and speaker mapping before connection (factory pinouts can vary by year)
• Works in both full and partial amplifier bypass configurations
• Ideal for systems with JBL or Mark Levinson factory amplifiers
Package Includes:
• APH-TY04 18″ T-Harness
• Installation guide and wiring chart