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| Revision as of 04:53, 26 July 2011 ddgonzal (Talk | contribs) (->Automatic Choke Relay) <- Previous diff |
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| [http://datsun1200.com/modules/myalbum/photo.php?lid=14977 http://datsun1200.com/uploads/photos/14977.jpg] | [http://datsun1200.com/modules/myalbum/photo.php?lid=14977 http://datsun1200.com/uploads/photos/14977.jpg] | ||
| - | 25235-P0101 ASSY-RELAY,HEATER,AUTO CHOKE | + | 25235-P0101 ASSY-RELAY,HEATER,AUTO CHOKE $68.68 |
| - | 25235-P0100 ASSY-RELAY,HEATER,AUTO CHOKE 0671- USA | + | superseded 25235-P0100 ASSY-RELAY,HEATER,AUTO CHOKE 0671- USA |
| Same as Datsun 510 | Same as Datsun 510 | ||
| + | Same as Datsun 521 pickup | ||
| + | 240Z Pump Relay | ||
| + | |||
| + | |||
| + | Alternatives | ||
| + | * The B310 relay is much cheaper, but has six connectors. 2 would remain unused if you used that switch which has a different connector. 25230-89915 | ||
| + | * B210 relay is same, but uses B210 style connector 25235-H6200/B5235-H6200 | ||
| + | * Generic 12V normally-open relay could be used (4-spade connectors) | ||
| + | |||
| Also see: [[Choke_Operation_and_Adjustment#Wiring|Choke Operation]] wiring section | Also see: [[Choke_Operation_and_Adjustment#Wiring|Choke Operation]] wiring section | ||
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| * The check test connector is located under the dash near the fuse box. | * The check test connector is located under the dash near the fuse box. | ||
| - | 25230-89915 RELAY ASSY-AUTO CHOKE | + | 25230-89915 RELAY ASSY-AUTO CHOKE $24.57 USD |
| + | B5230-89985 | ||
| + | 240Z ignition relay | ||
| = Alternator Upgrade = | = Alternator Upgrade = | ||
Revision as of 05:21, 26 July 2011
Our Datsun B110 used -- as with most 1964-1974 cars -- an Alternator with external Voltage regulator.
Contents |
Overview
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 (nuetral 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) |
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. B110 uses a normally open relay -- the choke is powered all the time when IGN is on, but when the engine is not running the relay disconnects the choke power.
As soon as the choke heater gets hot, it comes off the choke. If your engine is cold, you won't be able to restart it. For example, if you listen to the radio for a couple of minutes before starting the engine, and mistakenly put it to IGN, then the car won't start on a cold day. To prevent this scenario, the relay only powers the choke when the engine is running. The alternator provides a signal when the engine is running. It is the Neutral Sense wire (N wire). This is a weak signal so a relay is used.
The choke is powered by a separate 10A fuse, which also supplies the Anti-diesel valve.
The relay is connected to Ground on one side, and to the N wire on the other.
Black: ground L (Blue): to 10A fuse then to IGN FUSE BOX (always hot) Red: choke Yellow: N wire of alternator & regulator (turns on relay)
25235-P0101 ASSY-RELAY,HEATER,AUTO CHOKE $68.68 superseded 25235-P0100 ASSY-RELAY,HEATER,AUTO CHOKE 0671- USA Same as Datsun 510 Same as Datsun 521 pickup 240Z Pump Relay
Alternatives
- The B310 relay is much cheaper, but has six connectors. 2 would remain unused if you used that switch which has a different connector. 25230-89915
- B210 relay is same, but uses B210 style connector 25235-H6200/B5235-H6200
- Generic 12V normally-open relay could be used (4-spade connectors)
Also see: Choke Operation wiring section
B310 Choke Wiring
B310 uses a combo relay, six connectors with both normally open and normally closed pairs. Turning on the ignition switch activates the relay, pulling power away from the choke heater. When the engine starts, the relay turns off, resuming flow of power to the choke.
NA B310 uses internally-regulated Hitachi LR Alternator with L terminal in place of N terminal.
The relay controls
- Normally closed (doesn't work when engine OFF):
- Choke Heater
- Fan relay
- Warm-up Relay 1
- Normally open:
- Brake lamps
Locations
- The choke relay is mounted in the relay box on the rigth side strut tower.
- The check test connector is located under the dash near the fuse box.
25230-89915 RELAY ASSY-AUTO CHOKE $24.57 USD B5230-89985 240Z ignition relay
Alternator Upgrade
Many different Datsun alternators and alternators from other makes can easily be fitted to the Datsun 1200.
See main article: Alternator Upgrades