Car Audio System Control Panel Diagram - Wiring & Input Guide #201617 (License: Personal Use)

This technical diagram illustrates the rear interface of a car audio head unit, featuring labeled terminals for MRK (Marker), BCN (Beacon), VOL (Volume), BRT (Brightness), HI/LO test points, SPKR (Speaker), PHN (Phone), XMTR SEL (Transmitter Select), and multi-channel outputs for SPEAKER, NAV/COM, ADF, and PHONE. The layout includes rotary switches, toggle controls, and standardized pin connectors used in aviation or marine-grade audio systems. It serves as a reference for technicians during installation, diagnostics, or wiring harness integration.

Used in automotive, marine, or aviation electronics documentation; typically appears in service manuals, installation guides, or online repair forums where users seek to identify connections or troubleshoot audio subsystems. Matches user intent for wiring diagrams, component identification, or system integration support.