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Home >> Volvo >> 1986 >> 245 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - BOSCH BREAKERLESS >> Testing >> Spark Plug Wires

Spark Plug Wires

  1. If the spark plug connectors have sheet metal jackets, identified by the following symbol (two diodes facing each other), they contain "air gap" resistors. Wires cannot be checked for resistance using an ohmmeter. An oscilloscope must be used.
  2. On Volvo, connect ohmmeter to ends of spark plug wires. Wire resistance should be 4600-6600 ohms per 3 feet.
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