Savana 3/4 Ton Van V6-4.3L VIN W (1998)
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Poor connections cause arcing and burning of the commutator.
7. Inspect the armature for grounds using a self powered test lamp. If the test lamp lights when one test probe is placed on the commutator and the
other test lamp probe is placed on the armature core shaft, the armature is grounded. Replace the armature.
8. Inspect the brushes for wear. If the brushes are worn to half the size of a new brush, replace the assembly.
9. Inspect the brush holders for dirt or damage. Make sure that the brushes are not binding in the holders.
10. Inspect the brush springs for distortion or discoloring. If the springs are weak, bent, or discolored, replace the frame and field assembly.
11. Inspect the field coils.
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Look for burned or damaged insulation, damaged connections or loose poles.
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If the conditions of the coils is doubtful, replace the field and frame assembly.
12. Inspect the field coils for grounds.
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Connect a self-powered test lamp between the field frame and the field connector. Make sure the brush ends do not contact the field frame.
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If the test lamp lights, the field coils are grounded. Replace the field and frame assembly.
13. Inspect the field coils for opens.
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Connect a self-powered lamp between the field connector and each of the brushes.
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If the test lamp does not light at both brushes, the field coils are open. Replace the frame and field assembly
14. Inspect for field coils for shorts.
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Shorts are indicated by poor motor performance after everything else has been checked out.
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The coils cannot be replaced separately because of the integral frame construction. The frame and field assembly must be replaced.
15. Inspect the drive assembly (clutch) by turning the drive pinion in the cranking direction. If the drive pinion turns or slips in the cranking direction,
replace the over-running clutch assembly.
16. Inspect the solenoid for grounds using a self-powered 12 volt test lamp.
16.1. Connect the test lamp between the BAT terminal and the case. The lamp should not light (terminal should not be grounded).
16.2. Connect the test lamp between the S terminal and the case. Then connect the test lamp between the M terminal and the S terminal or
between the M terminal and the case. The lamp should turn on.
16.3. If the solenoid does not pass these checks, replace it.
