What fuse powers the radio in this diagram?

The radio is powered through a fuse marked 20 in the fuse block, fed from the ignition switch in the ACC or ON position.

What wire color supplies power to the radio?

A BR (brown) wire carries power from the fuse block through the main harness (connector 54M) and instrument harness (connector 1I) to the radio.

What wire colors are used for the speakers?

The speakers use B (black) and B/W (black/white) wires, routed through the door harness, speaker harness, and instrument harness.

How is the radio grounded?

A B/Y (black/yellow) wire from the radio runs through connector 10I to a body ground; the antenna also has its own body ground.

What is different in the 'with cassette deck' version?

The cassette version adds a separate radio-with-cassette-deck unit at connector 15I and uses left and right door speakers instead of a single front speaker, wired through door and speaker harnesses via connectors 12I and 2I.

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Nissan Radio Wiring Diagram - With & Without Cassette Deck, EL-57

Radio Wiring Diagram, with and without cassette deck, antenna and speaker circuits (Nissan FSM EL-57)

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Factory audio wiring diagram for radio with and without cassette deck, showing fuse block ACC feed, antenna, front and door speakers and body grounds.

AI caption February 2006 · Photo 403 of 412

This is a factory service manual page (page EL-57) showing the radio wiring diagrams for a Nissan vehicle, presented in two configurations: 'Without Cassette Deck' and 'With Cassette Deck'. Both diagrams show power supplied from the ignition switch (ACC or ON position) through a 20A fuse in the fuse block, feeding the radio via a BR (brown) wire routed through the main harness (connector 54M) and instrument harness (connector 1I). The without-cassette diagram shows a single front speaker connected with B (black) and B/W (black/white) wires through the speaker harness and instrument harness (connector 12I), with body grounds via B/Y (black/yellow) wire at connector 10I and at the antenna. The with-cassette diagram adds a separate radio-with-cassette-deck unit (connector 15I) and left and right door speakers wired with B and B/W wires through door, speaker, and instrument harnesses (connectors 12I and 2I). Diagram reference numbers SEL524I and SEL525I appear at the bottom right of each schematic. A reader can learn the wire colors, harness routing, connector identifiers, fuse rating, and grounding points for diagnosing or installing the factory radio, cassette deck, antenna, and speaker circuits.

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Frequently asked questions

What fuse powers the radio in this diagram?: The radio is powered through a fuse marked 20 in the fuse block, fed from the ignition switch in the ACC or ON position.
What wire color supplies power to the radio?: A BR (brown) wire carries power from the fuse block through the main harness (connector 54M) and instrument harness (connector 1I) to the radio.
What wire colors are used for the speakers?: The speakers use B (black) and B/W (black/white) wires, routed through the door harness, speaker harness, and instrument harness.
How is the radio grounded?: A B/Y (black/yellow) wire from the radio runs through connector 10I to a body ground; the antenna also has its own body ground.
What is different in the 'with cassette deck' version?: The cassette version adds a separate radio-with-cassette-deck unit at connector 15I and uses left and right door speakers instead of a single front speaker, wired through door and speaker harnesses via connectors 12I and 2I.