How to Wire a Pioneer DEH 305

Written by erick kristian
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How to Wire a Pioneer DEH 305
Pioneer is a large Japanese mobile electronics company. (autoradio 2 image by Nathalie P from

The Pioneer DEH 305 is a discontinued CD player head-unit car radio receiver. Wiring this unit requires the installer to have a copy of the wiring diagram. The wiring diagram is a legend for what colour wire represents what signal. Once the identity of all the wires has been determined it can then be wired to the car. The Pioneer DEH 305 has four channels -- front left, front right, rear left, rear right.

Skill level:

Things you need

  • Electrical tape
  • Wire stripper
  • Wiring diagram

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  1. 1

    Determine the function of the different coloured wires. The wire codes for the Pioneer DEH 305 are as follows:

    Red: +12V power

    Black: - Ground

    Pink: + Left Front

    Purple: - Left Front

    Brown: + Right Front

    Dark Brown: - Right Front

    Dark Green: + Left Rear

    Light Green: - Left Rear

    Dark Blue: + Right Rear

    Light Blue: - Right Rear

  2. 2

    Locate the stereo wiring diagram for the year, make and model of the car. This can be obtained from the manufacturer or may also be in the owner's manual.

  3. 3

    Match the wires on the Pioneer DEH 350 to the corresponding wires in the vehicle. For example, match + Left Front with + Left Front. Do this for each wire.

  4. 4

    Twist each of the wire pairs together. Tape the connection using electrical tape. The Pioneer DEH 350 has been wired.

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