Lamp Wiring
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.
See also: Headlight Wiring
Wire color codes
| B | Black |
| W | White |
| R | Red |
| Y | Yellow |
| G | Green |
| L | Blue |
Wires with two codes: The first letter is the wire color, the second is the stripe color. Example:
BW - Black wire with White stripe
Overview
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
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:
- #Front Combo Lamp "Park" bulbs
- #Rear Combo Lamp "tail" bulbs
- #side marker lamps (North America only)
Power comes from the PT fuse in the Fuse Box, and is supplied to the main Green/Blue wire via the Lighting Switch.
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
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.
Dash Indicator Lamps
The Cluster Gauge contains the Left and Right indicator lamps
Main: Instrument Panel Wiring
Japan
Japan-market has Hazard switch but only one Flasher Unit
Late Japan with single-position Hazard switch
USA
USA circuit - has Hazard switch with seperate Hazard Flasher Unit
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.
Fig. BE-29 Circuit diagram for hazard lamp system
The BG wire is for the Horn ring contact arm
6-PIN CONNECTOR 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
INDIVIDUAL WIRE 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)
USA: NILES Turn Signal flasher bolts to left side of column brace
W wire goes into steering column harness, up to the T/S switch
G is the other wire
B210
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 feed | From Flasher Unit |
| GB | Right-side T/S circuit | To Right-side (GB) T/S circuit To Instrument panel GR wire (right T/S lamp) |
| GR | Left-side T/S circuit | To 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.
Lamps
Side Marker lamp connector
North America
| Bulb | Ground | |
| GL (front lamp) | B | non-flashing bulb |
| RL (rear lamp) | B | non-flashing bulb |
*NOTE: ground wire is also connected to housing
Other than North America
| -- | Earth/Ground | body 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
| B | Ground | body connection |
| GB | Right-side T/S circuit (R.H. side only) |
From right-side (GB) T/S circuit |
| GR | Left-side T/S circuit (L.H. side only) |
From left-side (GR) T/S circuit |
| GL | Dedicated parking lamp circuit | From GL circuit |
Rear Combo Lamp
Rear combination Lamp Box
| REV | RB | Reverse lamp circuit |
| T/S | WR | To Left- or Right-side T/S circuit GB (R.H.) GR (L.H.) |
| STOP | GY | Brake light circuit |
| TAIL | GW | Running lights circuit |
| EARTH | B | Rear 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.
| TAIL | GL | Running lights circuit |
| LICENSE | GW | connects to Running lights circuit |
* The license lamp grounds through its bolts, and into the body. For sedan, this is through the bumper.
Interior Dome Light
Main: Room Lamp#Wiring
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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