Ce-niehoff-co N1241-1 Troubleshooting Guides Manual de usuario descargar pdf (Pagina 5)

Page 5

TG0043B

Section 3: Advanced Troubleshooting

(CONT’D)

Test for battery voltage at alternator 28 V B+ terminal. Does battery voltage exist?

Ye s

Repair vehicle wiring as necessary. Continue test.

Run engine and re-test charging circuit for operation.

Chart 1 – 28 V LED Flashing AMBER – No 28V Alternator Output – Test Charging Circuit

Jumper 28 V B+ terminal on alternator to E terminal on regulator. Wait 10 seconds. Run engine. Does

alternator charge and is 28 V LED flashing GREEN?

Yes

Turn off engine, leave key on. Remove jumper wire. Go to E

terminal on regulator. Test for battery voltage going into E

terminal from battery. Does battery voltage exist?

Ye s

STATIC TEST – MASTER SWITCH ON, KEY ON, ENGINE OFF

Repair vehicle circuit to E terminal.

Vehicle charging circuit test is complete.

Ye s

Turn off engine, leave key on. Connect

jumper wire from pin A in alternator-to-

regulator harness plug to B– terminal on

alternator. Spark will occur. Touch steel

tool to shaft to detect significant magne-

tism. is shaft magnetized?

Alternator is

defective.

Figure 3 – 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+

Pin F AC

Alternator is

defective.

Ye s

Set DMM to diode test. Connect DMM red

lead to pin F on harness plug. Connect

black leak to alternator B+ terminal.

Reverse leads. Meter should read OL in

one direction, and voltage drop in the other

direction. Do tests prove out?

Alternator is

defective.

Regulator is

defective.

Ye s

Connect DMM red lead to pin D on harness

plug. Connect black lead to pin C on same

plug. Does battery voltage exist?

When performing the

following test, connect

jumper wire away from

pin A or not at pin A.

Spark may erode pin.

CAUTION

1 2 3 4 5 6 7 8

Comentarios a estos manuales

Sin comentarios

Ce-niehoff-co N1241-1 Troubleshooting Guides Manual de usuario Pagina 5

Comentarios a estos manuales

Relacionado con productos y manuales para Hardware Ce-niehoff-co N1241-1 Troubleshooting Guides