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Ignition Control Unit (Vanagon)
- Turn ignition off. Attach DVOM to primary terminals of ignition coil. Disconnect hall sender wire harness connector from distributor. Turn ignition on.
- While observing DVOM reading, attach center terminal of connector to ground for 3 seconds. DVOM reading should briefly increase to 4.5 volts. If not, check wiring for short or open circuit. If wiring is okay, replace ignition control unit.