929 V6-3.0L DOHC (1993)
Alternator: Testing and Inspection
Diagnosis & Testing
No-Load Test
1. Ensure all electrical loads are off and brake pedal is released.
2. Install ammeter as shown in Fig. 7, then start engine and raise RPM to between 2,500 - 3,000 RPM.
Fig. 7 No-Load & Load Test Connections
3. Ensure alternator output is at least 5 amps. If not, replace alternator as necessary.
Load Test
1. Connect ammeter between terminal B wire and terminal B of alternator, Fig. 7.
2. Turn all vehicle accessories on and depress brake pedal.
3. Start engine and increase engine speed to 2,500 - 3,000 RPM. Ensure alternator minimum output is as specified under Alternator Specifications.
4. If current is not as specified, alternator has internal problems and should be replaced.
Voltage Output Test
1. Turn all electrical loads off and release brake pedal.
2. Start engine and raise engine speed to 2,500 - 3,000 RPM. Ensure voltage output between terminal L or S and ground, Fig. 8, is as specified under
Alternator Specifications.
