L.T. Rich Products Z-Plug, Owner'S Manual

Charging Issues: 

20 Amp Regulated Alternator 

The 20 amp regulated alternator system provides AC current through two output 
leads to the regulator-rectifier. The regulator-rectifier converts the AC current to 
DC, and regulates current to the battery. The charging rate will vary with engine 
RPM and temperature. 

1.Stator assembly (1) Figure 30. 
2. Two YELLOW leads (2) from Stator. 
3. RED DC output lead (3) from connector. 
4. Connector (4). 
5. Two YELLOW AC input leads (5). 
6. Regulator-rectifier (6). 
7. RED DC output lead (7) to connector 

NOTE:

 Stator (1), regulator-rectifier (6) and fly-wheel are NOT 

INTERCHANGEABLE with any other charging system. 

      (Figure 30)                                        (Figure 31)  

Output Test 

WHEN  CHECKING  THE   ALTERNATOR  COMPONENTS,   
PERFORM   THE  TEST  IN  THE   FOLLOWING  SEQUENCE: 

Temporarily disconnect stator wire harness from regulator-rectifier. 
 
1.

Insert RED test lead into 

VΩ

 receptacle in meter.  

2.

Insert BLACK test lead into 

COM

 receptacle. 

3.

Rotate selector to V~ (AC VOLTS) position. 

CAUTION:

 Attach meter test leads to the AC output terminals (YELLOW wires) 

in the connector BEFORE starting the engine. If the stator is grounded (defective) 
and the meter test leads contact the center DC output pin (RED wire) in the 
connector, arcing could occur, damaging the wiring. 

4.

Attach RED (2) and BLACK (1) test lead probes to the YELLOW wire (4) 
AC output terminals (6), of the connector (3), as shown in Figure 31. (Meter 
test clip leads may be attached to either AC output terminal). 

5.

If 

NO

 or 

LOW

 output is found check for bare wires or other defects. If 

shorted leads are not visible, replace the stator. 

6.

With the engine running at 

3600RPM

 output should be 

no less than 26 Volts

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