Stator Winding Continuity Test
- Remove the stator (1) from the frame assembly.
Illustration 1 | g00868876 |
(1) Stator (A) Stator lead (B) Stator lead (C) Stator lead |
- Unsolder all the stator leads from the rectifier: (A), (B) and (C)
- Connect the multimeter leads across a pair of stator leads: (AB), (AC) and (BC) .
- Measure the resistance between the stator leads.
Expected Results:
Show/hide tableTable 1 Alternator     Resistance     7N-9728     .25 ± .05 ohms     9G-9538     .20 ± .05 ohms     100-5046     .20 ± .05 ohms     Results:
OK - The resistance is within tolerance. Repeat steps 1 through 4 for all other possible pairs of stator leads: (AB), (AC) and (BC). If all of the results are OK, the stator is normal. STOP.
NOT OK - The resistance is above tolerance. The stator (1) has an open circuit. Replace the stator. STOP.
NOT OK - The resistance is below tolerance. Stator (1) has a short circuit. Replace the stator. STOP.
Stator Winding Ground Test
Illustration 2 | g00868878 |
(1) Stator assembly (2) Test lead to frame (A) Stator lead (B) Stator lead (C) Stator lead |
- The stator assembly remains removed from the alternator.
- Connect the multimeter leads acrossthe frame (2) and one of the stator leads (A), (B), or (C) .
- Measure the resistance.
Expected Result: The resistance is greater than 100000 ohms.
Results:
OK - The resistance is greater than 100000 ohms. Repeat steps 1 to 3 for the other stator leads (A), (B), or (C). If all of the results are OK, the stator is normal. STOP.
NOT OK - The resistance is NOT greater than 100000 ohms. Stator (1) is shorted to the frame. Replace the stator. STOP.