Illumination Control

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GL and GX trim Datsun 1200s used illuminated electrical switch knobs. In 1973 all USA 1200s adopted the illuminated knobs. B210 also used this as standard fitment in Japan and USA.

Overview

A variable knob was turned to progressively dim the lamps.

H70 Type: Green knobs with words and illumination.

* Wipe Wash knob
* Heater Control knob
* Cigar Lighter knob 
* Auto-trans shift indicator lamp

From 1976
* Clock lamp
* Radio lamp

Control Switch

A resistor rheostat was used through 1976. This produced significant heat.

This switch went in-between the lamps and Earth/Ground (B wire).

For 1977 a new active semiconductor rheostat was introduced, which required a 12V IGN feed, but is otherwise wired the same.

Resistor Rheostat
B: Earth/Ground (notched side of connector)
RL: to lamps

Semiconductor Rheostat - Illumination Control
B: Earth/Ground
GW: to lamps & Lighting Switch from Fuse Box (RG)
GY: to lamps

Pin-Out

B310 Illumination Control
* Heater Control lamp
* Radio lamp
* Ash tray lamp
* Cigarette Lighter lamp
* Clock lamp
* To dash rotary connector
  Three lamps - Instrument Panel
  * Pin 5
  * Pin 6
* Shifter lamp (Automatic Tranmission)

Australia

Australia 1200s use a two-position bright/dim switch built into the Lighting Switch. It is not a rheostat (variable). The knob is twisted (rotated) to use either bright or dim position.

Wiring

See Wiring Diagrams

Part Numbers

See Switch Part Numbers