K 2500 Suburban 4WD V8-5.7L VIN R (1999)
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A resistance reading well above 1.3 ohms indicates a break or fault in the winding continuity.
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A resistance reading well below .8 ohms indicates a short or ground in the winding circuit.
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Replace the solenoid assembly if the resistance reading is extremely high or very low.
2. Use the following procedure in order to test the armature assembly. Replace a shorted or grounded armature, or an armature that shows evidence
of opens.
2.1. Perform the following procedure in order to test the armature for short circuits.
2.1.1. Rotate the armature in a growler.
2.1.2. Hold a steel strip such as a hacksaw against the armature.
2.1.3. If the steel strip vibrates in an area, a short is present.
2.2. Use a ohmmeter in order to test for continuity between the armature shaft and any point on the commutator. Continuity indicates a ground.
2.3. Inspect the points where the armature conductors join the commutator and or individual commutator segments for signs of arcing or burning.
These signs indicate opens.
3. Perform the following procedure in order to inspect the frame and field assembly for grounds or opens:
3.1. Inspect the field coil connections for opens between the field terminal and the connection points for insulated brushes on the filed coil straps.
3.2. Use a self-powered test lamp or ohmmeter in order to test for continuity or grounds between the frame and the field terminal.
3.3. Replace the frame and field assembly that has grounds or opens.
