Horn

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Datsun 1200 used dual horns (Japan STD models used a single horn). The horn system uses a three-connector relay, which is bolted to the right-side strut tower just below the ignition coil.

Location

The horn relay is bolted to the right strut tower, under the coil.

The horn(s) are bolted to the radiator Core Support panel.

No. 3: horn relay

Horn Button

The horn contact is part of the turn signal switch. If this tab is bent, or electrically burned, the horn won't work. Ditto if the T/S switch is loose.

Post 480279

The horn contact touches the underside of the Steering wheel. If this outer ring improperly lubricated. the horn can have intermittent problems.

Wiring

Horn wiring schematic:

• Fuse 'H' is in the Fuse Box
• + battery voltage is supplied by the horn relay. The horn button switch earths the relay, causing it in turn to supply voltage to the horn. As the horn is a high amperage device, this keeps the power wires out of the steering wheel
• Earth (ground) for the horn is just the fact that it's bolted to the core support panel
• Earth for the horn button goes through the steering wheel hub, which is bolted to the steering gearbox shaft, so it is earthed via the metal of the steering column/gearbox.

Relay Wire Colors

* Green: to horns
* Green/white: to 15A fuse in fuse box, Battery side
* Black/green: to steering column connector (for horn button)
* Case bolts to body (earth/ground)

Early Relay

Stamped on the relay case are:
* H - connector for Horns
* B - connector for Battery (through fuse box)
* S - connector for Switch (in steering wheel)

Late Relay 26321-G1600 7510-

Part Numbers

26310-H1000 ASS'Y-HORN, high ALL (exc. Coupe)
26310-H1800 ASS'Y-HORN, high, sports Coupe, GX
26330-H1000 ASS'Y-HORN, low DX (exc. Coupe)
26330-H1800 ASS'Y-HORN, low, sports Coupe, GX
26320-14800 RELAY-horn
* 83-10510-14 SCREW (fixing horn relay)