C.E. Niehoff & Co. C726 Troubleshooting Guides User Manual
Page 5

Page 5
TG69A
Section C: Advanced Troubleshooting
(CONT’D)
Figure 4 – Alternator-to-Regulator Harness Plug
Chart 1 cont’d from Page 4 –
No Alternator Output –
Quick Diagnostic
Momentarily (1 sec.) jumper pin F in harness plug to alternator B+ terminal. Touch shaft with steel tool to
detect significant magnetism. Is shaft magnetized? Repeat magnetism test for pin A.
Yes
No
Alternator is defective.
Regulator is defective.
Yes
No
Alternator is defective.
With DMM on resistance scale: Connect red lead to pin D in harness plug. Connect black lead to alternator
B+ terminal. Meter should read 0 ohms. Change pin D to pin G. Meter should read 0 ohms.
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]
A
B
C
D
E
F
G
H
CONNECTIONS
A
F–
B
AC
1
C
B–
D
B+/Kelvin
−
E Temp
F
F+/D+
G Kelvin+
H AC
2