Alternator Wiring

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Categories: Charging System | Wiring

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Revision as of 10:42, 30 April 2016 ddgonzal (Talk | contribs) (->How the Alternator Dash Light Works) <- Previous diff		Current revision ddgonzal (Talk | contribs) (->Overview)
Line 1:		Line 1:
-	[[Category:Charging System]]
-	[[Category:Wiring]]
	Early 1200 use [[Alternator]] with external [[Voltage regulator]]. Later 1200s (from 1981) use an Internally Regulated (IR) Alternator.		Early 1200 use [[Alternator]] with external [[Voltage regulator]]. Later 1200s (from 1981) use an Internally Regulated (IR) Alternator.
	= Overview =		= Overview =
	B110 alternator is 35A and has plastic cover on back		B110 alternator is 35A and has plastic cover on back
-	<br><img size=400>http://datsun1200.com/uploads/photos/23630.jpg</img> [http://datsun1200.com/modules/myalbum/photo.php?lid=23630 album]	+	<br>{{Album|24375}}
-	= Early 1200 =	+	1980s 1200 is still 35A but uses internal regulator (IC REG)
-	Our Datsun B110 used -- as with most 1964-1974 cars -- an [[Alternator]] with external [[Voltage regulator]].	+	<br>{{Album|24756}}
-	Voltage Regulator Pinout	+	Both use the same T-connector, but IC REG alternator socket is additionally notched
-	<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts2/1V1250_pinout.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts2/th_1V1250_pinout.jpg]	+	<br>{{PhotoTh!|LRplug.jpg}} &nbsp; {{PhotoTh!|FNplug.jpg}}
-	[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts2/1V1250_pinout.jpg Wiring Diagram]	+	Datsun used the simple T-connector, but the NipponDenso C900 style can also be used. The locking tab prevents the connector from falling out.
-	<br><img size=400>http://datsun1200.com/uploads/photos/25445.jpg</img>	+	<br>{{Photo2|C900.jpg}}
-	'''Alternator Connections'''	+	= Early 1200 =
-	<table border='1' class='inner' cellspacing='2'>	+	Our Datsun B110 used -- as with most 1964-1974 cars -- an [[Alternator]] with external [[Voltage regulator]].
-	<tr bgcolor="ccccff"><td>terminal</td><td>Color</td><td>Logical Connections</td></tr>	+
-	<tr bgcolor=f0f0f0><td>A (Alternator)</td><td>WR or W</td><td>* To Battery + terminal through the [[Fusible Link]]<br>* To Regulator "A" terminal (W wire)</td></tr>	+
-	<tr bgcolor=f0f0f0><td>F (Field)</td><td>WB</td><td>* To Regulator "F" terminal</td></tr>	+
-	<tr bgcolor=f0f0f0><td>N (neutral point)</td><td>Y</td><td>* To Regulator "N" terminal<br>* To electric choke relay Y wire</td></tr>	+
-	<tr bgcolor=f0f0f0><td>E (Earth/ground)</td><td>B</td><td>* To body ground<br>* To Regulator "E" terminal</td></tr>	+
-	</table>	+
		+	{{Album|25445}}
-	'''Regulator Connections'''	+	'''Alternator Connections'''<table class="wiki_table" style="width:600px;">
-	<table border='1' class='inner' cellspacing='2'>	+	<tr><th>terminal</th><th>Color</th><th>Logical Connections</th></tr>
-	<tr bgcolor="ccccff"><td>terminal</td><td>Color</td><td>Logical Connections</td></tr>	+	<tr><td>A (Alternator)</td><td>W</td><td>* To Battery + terminal through the [[Fusible Link]]<br>* To Regulator "A" terminal (W wire)</td></tr>
-	<tr bgcolor=f0f0f0><td>A (Alternator)</td><td>W</td><td>* To Alternator "A" terminal (WR or W)</td></tr>	+	<tr><td>F (Field)</td><td>WB</td><td>* To Regulator "F" terminal</td></tr>
-	<tr bgcolor=f0f0f0><td>F (Field)</td><td>WB</td><td>* To Alternator "F" terminal</td></tr>	+	<tr><td>N (neutral point)</td><td>Y</td><td>* To Regulator "N" terminal<br>* To electric choke relay Y wire</td></tr>
-	<tr bgcolor=f0f0f0><td>N (neutral point)</td><td>Y</td><td>* To Alternator "N" terminal<br>* To electric choke relay Y wire</td></tr>	+	<tr><td>E (Earth/ground)</td><td>B</td><td>* To body ground<br>* To Regulator "E" terminal</td></tr>
-	<tr bgcolor=f0f0f0><td>E (Earth)</td><td>B</td><td>* To body ground<br>* To Alternator "E" terminal</td></tr>	+
-	<tr bgcolor=f0f0f0><td>IG (ignition)</td><td>WL (72:&nbsp;W?)</td><td>* To fuse box "M" terminal (does not go through IGN switch)</td></tr>	+
-	<tr bgcolor=f0f0f0><td>L (Light)</td><td>WR</td><td>* To dash light "IGN" ('72, '73) or "CHG" (1971)</td></tr>	+
	</table>		</table>
-	Hitachi LT-series uses the typical 1970s Hitachi T-shaped connector:	+	Alternator uses the typical 1970s T-shaped connector:
	F Field - stem of Tee		F Field - stem of Tee
	N Neutral point - head of Tee		N Neutral point - head of Tee
		+
		+	'''Regulator Connections'''<table class="wiki_table" style="width:600px;">
		+	<tr><th>terminal</th><th>Color</th><th>Logical Connections</th></tr>
		+	<tr><td>A (Alternator)</td><td>W</td><td>* To Alternator "A" terminal (W)</td></tr>
		+	<tr><td>F (Field)</td><td>WB</td><td>* To Alternator "F" terminal</td></tr>
		+	<tr><td>N (neutral point)</td><td>Y</td><td>* To Alternator "N" terminal<br>* To electric choke relay Y wire</td></tr>
		+	<tr><td>E (Earth)</td><td>B</td><td>* To body ground<br>* To Alternator "E" terminal</td></tr>
		+	<tr bgcolor=f0f0f0><td>IG (ignition)</td><td>WL</td><td>* To fuse box "M" terminal (does not go through IGN switch)</td></tr>
		+	<tr><td>L (Light)</td><td>WR</td><td>* To dash light "IGN" ('72, '73) or "CHG" (1971)</td></tr>
		+	</table>
		+
		+	Voltage Regulator Pinout
		+	<br>{{Photo!|1V1250_pinout.jpg|Datsun%201200/Parts2|width=SM}}
		+	Wire Color
		+	WR Lamp (to dash lamp)
		+	W Positive (12V from Fusible Link)
		+	Y Stator (Neutral point, tee-connector N)
		+	B Ground (Earth to horn bracket)
		+	WB Field (Tee-connector F)
		+	WL Ignition ([[Fuse Box|'M' fuse]])
	= Late-model Alternator =		= Late-model Alternator =
-	Datsun 1200 from 1981 (Japan-market models) use an internally-regulated Hitachi [[Hitachi LR Alternator|LR Alternator]] or equivalent.	+	Datsun 1200 from 1981 (Japan-market models) use an internally-regulated Hitachi [[Hitachi LR Alternator|LR Alternator]] or equivalent. The LR135 has LS wiring like many modern Japanese alternators. The L-terminal goes to the CHG lamp, and the S-terminal goes to either IGN or straight to the battery.
-	<br><img size=400>http://datsun1200.com/uploads/photos/24517.jpg</img> [http://datsun1200.com/modules/myalbum/photo.php?lid=24517 album]	+
		+	{{Album|24517}}
		+
		+	{{Album|24374}}
	== Using in Older 1200 ==		== Using in Older 1200 ==
Line 58:		Line 71:
	* When the alternator is not putting out current, the "L" terminal is at ground/earth, so the dash light turns on		* When the alternator is not putting out current, the "L" terminal is at ground/earth, so the dash light turns on
	* Once the alternator starts putting out current, the "L" terminal is at full voltage, so the light turns off (both sides of the light are at same voltage)		* Once the alternator starts putting out current, the "L" terminal is at full voltage, so the light turns off (both sides of the light are at same voltage)
		+
		+	<blockquote>WARNING: If the dash lamp is burned out, the alternator does not work. The lamp circuit is used to start the alternator.</blockquote>
	== External Regulator ==		== External Regulator ==
Line 66:		Line 81:
	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.		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
	== Internal Regulator ==		== Internal Regulator ==
	Internally regulated Hitachi LR alternators (S-L type) use the L terminal to turn the dash lamp on and off, using a transistorized switch inside the alternator.		Internally regulated Hitachi LR alternators (S-L type) use the L terminal to turn the dash lamp on and off, using a transistorized switch inside the alternator.
-
-	This type of alternator still charges even if the dash lamp is burned out or the L wire is disconnected.
	= Automatic Choke Relay =		= Automatic Choke Relay =
Line 79:		Line 89:
	See main article: [[Electric Choke Wiring]]		See main article: [[Electric Choke Wiring]]
		+	{{End}}[[Category:Charging System]][[Category:Wiring]]

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Current revision

Early 1200 use Alternator with external Voltage regulator. Later 1200s (from 1981) use an Internally Regulated (IR) Alternator.

Contents 1 Overview 2 Early 1200 3 Late-model Alternator 3.1 Using in Older 1200 4 Engine Swaps 5 How the Alternator Dash Light Works 5.1 External Regulator 5.2 Internal Regulator 6 Automatic Choke Relay

Overview

B110 alternator is 35A and has plastic cover on back
Album 24375

1980s 1200 is still 35A but uses internal regulator (IC REG)
Album 24756

Both use the same T-connector, but IC REG alternator socket is additionally notched
 

Datsun used the simple T-connector, but the NipponDenso C900 style can also be used. The locking tab prevents the connector from falling out.

Early 1200

Our Datsun B110 used -- as with most 1964-1974 cars -- an Alternator with external Voltage regulator.

Album 25445

Alternator Connections

terminal	Color	Logical Connections
A (Alternator)	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

Alternator uses the typical 1970s T-shaped connector: 
F Field - stem of Tee
N Neutral point - head of Tee

Regulator Connections

terminal	Color	Logical Connections
A (Alternator)	W	* To Alternator "A" terminal (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	* To fuse box "M" terminal (does not go through IGN switch)
L (Light)	WR	* To dash light "IGN" ('72, '73) or "CHG" (1971)

Voltage Regulator Pinout

Wire Color
WR Lamp (to dash lamp)
 W Positive (12V from Fusible Link)
 Y Stator (Neutral point, tee-connector N)
 B Ground (Earth to horn bracket)
WB Field (Tee-connector F)
WL Ignition ('M' fuse)

Late-model Alternator

Datsun 1200 from 1981 (Japan-market models) use an internally-regulated Hitachi LR Alternator or equivalent. The LR135 has LS wiring like many modern Japanese alternators. The L-terminal goes to the CHG lamp, and the S-terminal goes to either IGN or straight to the battery.

Album 24517

Album 24374

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

Engine Swaps

See main article: Basic Alternator Wiring

How the Alternator Dash Light Works

The dash lamp is connected to IGN +. The other side goes to the "L" terminal of either the external regulator or alternator. A relay turns the dash lamp on/off.

• When the alternator is not putting out current, the "L" terminal is at ground/earth, so the dash light turns on
• Once the alternator starts putting out current, the "L" terminal is at full voltage, so the light turns off (both sides of the light are at same voltage)

WARNING: If the dash lamp is burned out, the alternator does not work. The lamp circuit is used to start the alternator.

External Regulator

The dash lamp is connected to IGN +. The other side goes to the "L" terminal of the external regulator. A relay inside the Voltage Regulator turns the dash lamp on/off.

• 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.

Internal Regulator

Internally regulated Hitachi LR alternators (S-L type) use the L terminal to turn the dash lamp on and off, using a transistorized switch inside the alternator.

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

 

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