S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
Ignition Cable: Testing and Inspection
Spark Plug Wire Resistance Check
1. Disconnect both ends of each wire. Ensure the wire terminals are clean.
2. Set an ohmmeter on the high scale and connect it to each end of the wire being tested. Twist the wire gently while watching the ohmmeter.
3. If the ohmmeter reads above 30,000 ohms (no matter how long the wire is), or fluctuates from infinity to any value, replace the wire.
4. If the resistance of any wire is not within the following ranges, replace the wire being tested.
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0 to 15 inch wire - 3,000 to 10,000 ohms.
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15 to 25 inch wire - 4,000 to 15,000 ohms.
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25 to 35 inch wire - 6,000 to 20,000 ohms.
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Longer wire - should measure about 5,000 to 10,000 ohms per foot.
