Ce-niehoff-co N1506-1 Troubleshooting Guides Manual de usuario descargar pdf (Pagina 5)

Page 5

TG0018A

Yes

With engine off, is battery voltage present at alternator 14 V B+ terminal?

Chart 2 – No 14 V Alternator Output – Test Circuit

Yes

Connect DMM red lead to pin E on alternator-to-regulator harness plug. Connect black

lead to pin C on same plug. Does battery voltage exist?

Alternator is defective.

Repair vehicle wiring as necessary. Continue test.

Substitute a known good regulator. Run engine. Is system

charge voltage at regulator setpoint?

Yes

Alternator is

defective.

Original regulator

was defective.

Figure 4 – Alternator-to-Regulator Harness Plug

PIN CONNECTIONS

Pin A F–

Pin B SCR Gate

Pin C B–

Pin D 28 V B+

Pin E 14V B+

Yes

With engine running, does 28 V system charge properly?

Go to Chart 1, page 4.

Section 3: Advanced Troubleshooting

(CONT’D)

1 2 3 4 5 6 7 8

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Ce-niehoff-co N1506-1 Troubleshooting Guides Manual de usuario Pagina 5