![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
Early 1200 use Alternator with external Voltage regulator. Later 1200s (from 1981) use an Internally Regulated (IR) Alternator.
Contents |
Overview
Early 1200
Our Datsun B110 used -- as with most 1964-1974 cars -- an Alternator with external Voltage regulator.
Voltage Regulator Pinout
Alternator Connections
| terminal | Color | Logical Connections |
| A (Alternator) | WR or W | * To Battery + terminal through the Fusible Link * To Regulator "A" terminal (W wire) |
| F (Field) | WB | * To Regulator "F" terminal |
| N (neutral point) | Y | * To Regulator "N" terminal * To electric choke relay Y wire |
| E (Earth/ground) | B | * To body ground * To Regulator "E" terminal |
Regulator Connections
| terminal | Color | Logical Connections |
| A (Alternator) | W | * To Alternator "A" terminal (WR or W) |
| F (Field) | WB | * To Alternator "F" terminal |
| N (neutral point) | Y | * To Alternator "N" terminal * To electric choke relay Y wire |
| E (Earth) | B | * To body ground * To Alternator "E" terminal |
| IG (ignition) | WL (72: W?) | * To fuse box "M" terminal (does not go through IGN switch) |
| L (Light) | WR | * To dash light "IGN" ('72, '73) or "CHG" (1971) |
Hitachi LT-series uses the typical 1970s Hitachi T-shaped connector:
F Field - stem of Tee N Neutral point - head of Tee
Late-model Alternator
Datsun 1200 from 1981 (Japan-market models) use an internally-regulated Hitachi LR Alernator or equivalent.
Using in Older 1200
The LR135 is a bolt-in replacement for the LT135 BUT you must modify the wiring slightly.
See main article: IR Alternator Conversion Wiring
B310 North America
Datsun 210 uses an internally-regulated Hitachi LR-150 alternator.
Also see Hitachi LR Alternator Wiring
Black: earth/ground White: battery via Fusible Link (large wire) White/Red: dash CHG lamp While: battery via Fusible Link (small wire)
How the Alternator Dash Light Works
The dash lamp is connected to IGN +. The other side goes to the "L" terminal of the external regulator.
- When the alternator is not putting out current, the "L" terminal is at '-' voltage, so the dash light turns on
- Once the alternator starts putting out current, the "L" terminal is at + voltage, so the light turns off (both sides of the light are at +)
This also is connected to the F (field) connection of the alternator, so it "turns on" the alternator. It is the switched 12V (through the lamp) that kick starts the alternator fields.
WARNING: This mean that if the dash lamp is burned out, the alternator does not work
Automatic Choke Relay
On Datsuns equipped with an electric Automatic Choke, a relay is used so that the choke heater is activated only when the engine is running.
See main article: Electric Choke Wiring