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[Datsun 1200 encyclopedia]

Lamp Wiring

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Category: Body Electrical System

The lighting circuits generally use Green wires. Newer 1200 utes differ. The following information is for USA-spec models. Other countries vary slight, see the appropriate Wiring Diagram or click Edit and add the information here.


Wire color codes


Wires with two codes: The first letter is the wire color, the second is the stripe color. Example:
BW - Black wire with White stripe


The lighting circuits generally use Green wires:

  • G - IG-hot from Fuse Box
  • GY - Brake lights (stop lamps)
  • GL or GW - running lights (parking lights)
  • GB - R.H. Turn Signal + running lights
  • GR - L.H. Turn Signal + running lights

Lighting Switch and Turn signal switch circuits
19666.jpgAlbum 19666

Dash Lamps

Indicator lamps
* High beam indicator lamp (M.B.) - see Instrument Panel Wiring
* Turn Signal indicator lamps - see below
Warning lamps - see Instrument Panel Wiring
* Brake failure lamp (Japan GL & USA)
* CHG/IGN failure lamp
* Oil pressure indicator lamp

Hazards Wiring

The 4-way Hazards lights are part of the Turn Signal circuit. See #next section.

Park/Tail Circuit

When the Lighting Switch is pulled out one or two stops, these light up:

Power comes from the PT fuse in the Fuse Box, and is supplied to the main Green/Blue wire via the Lighting Switch.

27143.jpgAlbum 27143

Turn Signals

Also see:
* Turn Signals (include Hazards)
* Flasher unit
* Turn signal switch

The T/S path is as follows:

* 12 volts is provided From the IG side of the Fuse Box
* through the 10A "M" (Meter) terminal via the G (green) wire 
* through the Four-Way Flasher Switch (Hazards Switch). NOTE: non-USA export has no Hazard system
* to the Flasher unit
* through the T/S lever on the steering column
* to the lamp bulbs. There is no relay involved

#USA Wiring

Near the stalk are the three red Dimmer wires for the Head Lights system. Opposite are the T/S wires (two green plus one white). The last wire (not shown) is the blue wire for the Horn button contact.
28846.jpgAlbum 28846

Dash Indicator Lamps

The Cluster Gauge contains the Left and Right indicator lamps



Japan-market has Hazard switch but only one Flasher Unit

Late Japan with single-position Hazard switch
26230.jpgAlbum 26230


USA circuit - has Hazard switch with seperate Hazard Flasher Unit

24405.jpgAlbum 24405
Fig. BE-28 Circuit diagram for turn signal and dimmer switch system

The Hazard switch is normally off and so routes power through G wire to T/S Flasher Unit. This means the T/S Flasher is normally HOT (12V) -- but only if the key is ON. From the T/S Flasher unit the power goes to the T/S Switch on the column. In the center position of course the power stops here. But move the switch to right or left, and the power is fed to the Left or Right circuits to power the exterior bulbs and the the dash bulb. The T/S Flasher Unit causes the power to cycle, resulting in flashing.

28842.jpgAlbum 28842
Fig. BE-29 Circuit diagram for hazard lamp system

The BG wire is for the Horn ring contact arm
174_58432f233433f.jpgPost 482620

R or RY H/L power from Lighting Switch
RG H/L Low
RW H/L High
BG horn button
GR T/S left
GB T/S right
W from flasher unit (male spade)
SWITCH with Passing Lamp button has additional two wires
G (male spade) to passing lamp RELAY
B (female spade) Ground/Earth

USA: NILES Hazard flasher bolts to right side of column brace (G/L, G/W)
15957.jpgAlbum 15957

USA: NILES Turn Signal flasher bolts to left side of column brace
15958.jpgAlbum 15958
W wire goes into steering column harness, up to the T/S switch
G is the other wire


The B210 switch uses a 2nd connector, but otherwise the wiring seems similar to the 1200.

4-pin connector (3 pins populated)
GR LH indicator lamps
GL Flasher unit
GB RH indicator lamps
6-pin connector (4 or 6 pins populated)
  GY  Horn relay
1 R   Fuse box
2 RW? lighting switch
3 RB? low beams?
4 RW? high beams?
5 RY?

Dimmer Switch

Dimmer Switch (in T/S & Light Switch unit on steering column)
(T/S section of switch listed here)

?T/S hot feedFrom Flasher Unit
GBRight-side T/S circuitTo Right-side (GB) T/S circuit
To Instrument panel GR wire
(right T/S lamp)
GRLeft-side T/S circuitTo Left-side (GR) T/S circuit
To Instrument panel GR wire
(left T/S lamp)

\*Labeled "Beam" for 1971. The other side of this light is grounded.


Side Marker lamp connector

North America
GL (front lamp)Bnon-flashing bulb
RL (rear lamp)Bnon-flashing bulb
*NOTE: ground wire is also connected to housing

Other than North America
--Earth/Groundbody connection via screws
GB(R.H. side only)right indicator bulb
GR(L.H. side only)left indicator bulb

Front Combo Lamp

Front Parking T/S Lamp connector
BGroundbody connection
GBRight-side T/S circuit
(R.H. side only)
From right-side (GB) T/S circuit
GRLeft-side T/S circuit
(L.H. side only)
From left-side (GR) T/S circuit
GLDedicated parking lamp circuitFrom GL circuit

Rear Combo Lamp

Rear combination Lamp Box
REVRBReverse lamp circuit
T/SWRTo Left- or Right-side T/S circuit
GB (R.H.)
GR (L.H.)
STOPGYBrake light circuit
TAILGWRunning lights circuit
EARTHBRear Comb. lamp "fix bolt"
* The rear wiring harness has a ground wire that bolts to the FIX BOLT, the right-side rear bumper hold-down bolt (inside the car).

License plate lamp(s)

The rear License Lamp is simply connected to the rear-harness "tail" circuit (rear running lights -- GW wire). But it is grounded locally, not through a harness wire.

TAILGLRunning lights circuit
LICENSEGWconnects to Running lights circuit
* The license lamp grounds through its bolts, and into the body. For sedan, this is through the bumper.

27142.jpgAlbum 27142

Interior Dome Light

Brake lights

Brake lights (STOP lamps) -- thankfully -- are simply connected on the B110. At the rear light boxes, the GY wires connect to the main harness GY circuit. This is connected to the "Stop Lamp Switch" at the brake pedal. The other side of this switch (both are YG wires) is connected to Fuse Box GY wire ("H" terminal 15A always-hot). So brake lights work when key is off.

Instrument panel Brake lamp

The IP brake lamp is not related to the rear brake lamps. Instead it signals if the hand brake is on ("Parking Brake Switch"), or if the master cylinder brake light switch ("Brake System Switch") senses a pressure differential problem.

Reverse Lights

The reverse lamps are simply connected. The Red wire connects to the reverse switch on the side of the transmission. This switch in turn is fed from the G wire at the fuse box ("M" terminal of fuse box -- 10A fuse). It's always in effect, regardless of the Light Switch position. In other words, the Reverse light should work even if the headlights or running lights are off. 

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