Ce-niehoff-co N1128 Troubleshooting Guides Manual de usuario descargar pdf (Pagina 7)

Page 7

TG0027A

(CONT’D)

Section 4: Advanced Troubleshooting

Chart 2 – 14 V LED Solid AMBER – No 14 V Alternator Output – Test Circuit

Figure 5 – Phase Connection 3-Pin Harness Plug

PIN CONNECTIONS

A Phase P1

B Phase P2

C Phase P3

With key off, engine off: Test for battery voltage of 14 V output terminal on regulator.

Does +14 V battery voltage exist?

Ye s

Yes

Set DMM to diode tester. Connect red lead of DMM to socket C of regula-

tor harness plug and black lead to each phase pin in phase harness

plug. Meter should show voltage drop value.

Then reverse meter lead connections. Meter should show OL (blocking).

Alternator is defective.

Regulator is defective.

Figure 4 – Alternator-to-Regulator 4-Socket Harness

Plug

SOCKET CONNECTIONS

AF–

B Phase Signal AC

CB–

D 28 V B+

Check and repair wiring and battery cables as necessary.

Continue test.

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Ce-niehoff-co N1128 Troubleshooting Guides Manual de usuario Pagina 7