Inspect
Battery – charged and earth connected; terminals tight unbroken not oxidised.
Ground connections for alternator engine body battery – satisfactory.
Positive cable battery/starter/alternator – tight unbroken with voltage drop in leads during starting to be less than 0.5 V.
Caution
If voltage drop is greater than 0.5 V determine cause and rectify.
Install
Opel Tester for voltage and current measurement according to operating instructions.
Red connector to battery positive terminal and black connector to battery negative terminal.
Clamp-on probe to cable between battery and starter – arrow on probe points away from battery.
Inspect
Starter function – engage top gear apply foot and parking brakes and engage starter using starter key switch.
Test values:
- 4JA1T/4JA1TC engine – 8.76 V/300 A or less.
- 4JG2T engine – 3 V/1300 A or less.
Caution
Maximum duration of test 5 seconds to prevent overheating.
Checking diagnosis:
| Symptom | Possible cause |
|---|---|
| Voltage too low | Localize voltage drop |
| Current consumption too high | Short circuit in starter |
| Current consumption too low | Commutator dirty |
| Carbon brushes worn out | |
| Solenoid switch defective | |
| Interruption |
If current consumption is too high or too low overhaul starter.