C.E. Niehoff & Co. N1313 Troubleshooting Guides - Manual (Page 8)

Page 8
TG16F
Section C: Advanced Troubleshooting
(CONT’D)
Normal Resistance
Lead Connections from DMM Reading Component Tested
red to pin C in 3-pin receptacle and
black to socket C in 5-socket receptacle
OL* 14 V control signal
red to socket C in 3-socket plug and SCR gate in
black to socket A in 3-socket plug 7-13 anti-drive end housing
14 V Functions
28 V Functions
Lead Connections from DMM Normal
to 5-socket Receptacle Reading Component Tested
red to socket A and black to socket C OL* (resistance) Power transistor
Short tone on
red to socket A and black to socket D Diode Checker* Supressor diode
Figure 7 – Alternator-to-Regulator 5-Pin Harness Plug Figure 8 – Alternator-to-Regulator 3-Socket
Harness Plug
A
B
C
* If readings register other than those shown, regulator is defective.
** If readings register other than those shown, anti-drive end housing is defective.
3-SOCKET CONNECTIONS
A 14 V B+
B unused
C 14 V Control
5-PIN CONNECTIONS
A
F–
B unused
C B–
D 28 V B+
E Phase
3-PIN CONNECTIONS
A 14 V B+
B unused
C 14 V Control
5-SOCKET CONNECTIONS
A
F–
B unused
C B–
D 28 V B+
E Phase
Figure 9 – Alternator-to-Regulator Harness Connections at Regulator – 5-Socket Receptacle and 3-Pin Receptacle
A
B
C
A
B
C D
E
If you have questions about your alternator or any of these test procedures, or if you need to locate a Factory Authorized Service Dealer, please contact us at:
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 USA
TEL: 800.643.4633 USA and Canada • TEL: 847.866.6030 outside USA and Canada • FAX: 847.492.1242
E-mail us at [email protected]