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Injector Circuit

  1. Disconnect all injector harness connectors. Using a DVOM, check resistance across terminals of each injector. Refer to the INDIVIDUAL INJECTOR RESISTANCE  table.
  2. Disconnect injector bank harness connector, and check resistance of injector bank. See INJECTOR BANK RESISTANCE  table. Repair wiring or replace any injector circuit not within specification.
INDIVIDUAL INJECTOR RESISTANCE

Engine Ohms
3.0L 15-18
4.0L 11-18
INJECTOR BANK RESISTANCE

Engine Ohms
3.0L 5.0-6.5
4.0L 4.0-5.5