: Chassis Ground. Connect to a clean, paint-free metal surface.
: Switched 12V (Accessory/Ignition). Powers the unit on only when the key is in the "ACC" or "ON" position.
: The back of the unit features a 10A Fuse , a Wired Remote Input for steering wheel adapters, and RCA Pre-outs for rear or subwoofer output.
: Constant 12V (Battery/Memory). Provides power for the clock and radio presets.
: Detailed board-level schematics and parts lists are available through technical repositories like Elektrotanya .
Pioneer DEH-P2500R uses a standard Pioneer 16-pin wiring harness. You can download the official Pioneer DEH-P2500R Service Manual for full circuit schematics. Wiring Harness Color Codes
Are you or installing this in a new project ? I can help you find the specific vehicle-specific adapter if you tell me your car's make and year . How to Install a Pioneer Radio and its Wiring Diagram