C.E. Niehoff & Co. C726 Troubleshooting Guides - 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.
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Regulator is defective.
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Yes No
Alternator is defective.
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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
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