C.E. Niehoff & Co. N1335 Troubleshooting Guides - Manual (Page 6)

Page 6
TG0052A
Section 4: Advanced Troubleshooting
Figure 5 – Alternator-to-Regulator Harness Plug
PIN CONNECTIONS
Pin A F–
Pin B Phase 1
Pin C GND/B–
Pin D B+
Pin E Kelvin +
Pin F F+
Pin G Kelvin –
Pin H Phase 2
Chart 1 cont’d from Page 5 – No Alternator Output –
Quick Diagnostic
Momentarily (1 sec.) jumper pin F in harness plug to alternator B+ terminal and jumper pin A in harness plug to
B- terminal. Touch shaft with steel tool to detect significant magnetism. Is shaft magnetized?
Yes No
Alternator is defective.
T
Regulator is defective.
T
T
Yes No
Alternator is defective.
T
(CONT’D)
With DMM on resistance scale: Connect red lead to pin E in harness plug. Connect black lead to alternator B+
terminal. Meter should read 0 ohms. Change pin E 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