K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
Steps 9-14
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests the ignition 1 relay control circuit from the ECM.
5. This step isolates the circuit from the IGN relay. All of the circuits at the relay are good if the test lamp illuminates.
