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Diagnosis and repair



{tag}1167431286@
{tag}1167434859@





Using a suitable ohmmeter, connect one probe to alternator BAT (B+) terminal, Figs. 20 and 21, and the other probe to the STA terminal (rear blade terminal). Then, reverse the ohmmeter probes and repeat the test. A reading of about 6.5 ohms should be obtained in one direction and no needle movement with the probes reversed. A reading in both directions indicates a bad positive diode, a grounded positive diode plate or a grounded BAT terminal.
Perform the same test using the STA and GND (ground) terminals of the alternator. A reading in both directions indicates either a bad negative diode, a grounded stator winding, a grounded stator terminal, a grounded positive diode plate, or a grounded BAT terminal.
Infinite readings (no needle movement) in all four probe positions in the proceeding tests indicates an open STA terminal lead connection inside the alternator.Fig. 20 Testing Diode TrioFig. 20 Testing Diode Trio

{tag}1167434859@





Using a suitable ohmmeter, connect one probe to alternator BAT (B+) terminal, Figs. 20 and 21, and the other probe to the STA terminal (rear blade terminal). Then, reverse the ohmmeter probes and repeat the test. A reading of about 6.5 ohms should be obtained in one direction and no needle movement with the probes reversed. A reading in both directions indicates a bad positive diode, a grounded positive diode plate or a grounded BAT terminal.
Perform the same test using the STA and GND (ground) terminals of the alternator. A reading in both directions indicates either a bad negative diode, a grounded stator winding, a grounded stator terminal, a grounded positive diode plate, or a grounded BAT terminal.
Infinite readings (no needle movement) in all four probe positions in the proceeding tests indicates an open STA terminal lead connection inside the alternator.{tag}1167431286@
Fig. 21 Alternator W/integral Regulator Rectifier Short Or Grounded And Stator Grounded TestFig. 21 Alternator W/integral Regulator Rectifier Short Or Grounded And Stator Grounded Test






Using a suitable ohmmeter, connect one probe to alternator BAT (B+) terminal, Figs. 20 and 21, and the other probe to the STA terminal (rear blade terminal). Then, reverse the ohmmeter probes and repeat the test. A reading of about 6.5 ohms should be obtained in one direction and no needle movement with the probes reversed. A reading in both directions indicates a bad positive diode, a grounded positive diode plate or a grounded BAT terminal.
Perform the same test using the STA and GND (ground) terminals of the alternator. A reading in both directions indicates either a bad negative diode, a grounded stator winding, a grounded stator terminal, a grounded positive diode plate, or a grounded BAT terminal.
Infinite readings (no needle movement) in all four probe positions in the proceeding tests indicates an open STA terminal lead connection inside the alternator.Fig. 20 Testing Diode TrioFig. 20 Testing Diode Trio

Fig. 21 Alternator W/integral Regulator Rectifier Short Or Grounded And Stator Grounded TestFig. 21 Alternator W/integral Regulator Rectifier Short Or Grounded And Stator Grounded Test






Using a suitable ohmmeter, connect one probe to alternator BAT (B+) terminal, Figs. 20 and 21, and the other probe to the STA terminal (rear blade terminal). Then, reverse the ohmmeter probes and repeat the test. A reading of about 6.5 ohms should be obtained in one direction and no needle movement with the probes reversed. A reading in both directions indicates a bad positive diode, a grounded positive diode plate or a grounded BAT terminal.
Perform the same test using the STA and GND (ground) terminals of the alternator. A reading in both directions indicates either a bad negative diode, a grounded stator winding, a grounded stator terminal, a grounded positive diode plate, or a grounded BAT terminal.
Infinite readings (no needle movement) in all four probe positions in the proceeding tests indicates an open STA terminal lead connection inside the alternator.


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