Page 184 - CTS - Mechanic Diesel - TP
P. 184
MECHANIC DIESEL - CITS
2 Check relay operation
• Apply battery voltage.
Note: Make sure polarity is as shown
• Connect the ohmmeter leads between terminals”1” and “2.” Continuity (no resistance) should be indicated.
• If relay operation is not as specified, replace the relay.
Charging System Troubleshooting
Problem Possible Cause Action
Warning lamp does not light, 1 Blown Fuse 1 Check CHARGE, IGN and
with ignition ON and engine ENGINE fuse replace as needs
off. after correcting cause
2 Lamp burned out 2 Replace lamp
3 Wiring Connections loose 3 Check voltage drop in circuit,
lighten
4 Defective relay 4 Check relays, if used for continuity
and proper operation
5 Defective regulator 5 Check alternator output
Warning lamp does not go 1 Loose or warn drive belt 1 Check drive belt; adjust or replace
out with engine running; 2 Defective battery or battery as needed after correcting cause
battery overcharged or connections 2 Check battery and its connections
undercharged 3 Check fuse and fusible link;
3 Blown fuse or fusible link
4 Defective relay regulator or replace as needed
alternator 4 Check charging system output and
5 Defective wiring components operation as needed
5 Check voltage drop
1 Loose or worn drive belt 1 Check drive belt adjust or replace
Noise 2 Worn alternator bearings as needed
3 Defective diode 2 Replace the alternator
3 Replace the alternator
No charge when engine Blown fuse wire in regulator Locate cause and rectify and then
running Drive bell loose replace fuse
Broken drive belts Adjust belt tension
Worn out or sticky brush Replace
Open field circuit Replace
Open charging circuit Rectify
Open circuit in stator winding Rectify
Open rectifier circuit Rectify
Defective diodes Rectify
Worn or dirty slip rings Replace
Loose connections Replace
Tighten
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CITS : Automotive - Mechanic Diesel - Exercise 10.1 CITS : Automotive - Mechanic Diesel - Exercise 10.1
