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The numbers below refer to the step numbers on the diagnostic table. 2: This step determines of the coil has excessive resistance or if the windings are shorted 3: This step determines if the coil or pigtail is shorted to ground. 4: This step determines if either the differential lock control or differential lock return 5: This step determines if the differential lock control and differential lock return circuits 6: This step tests for an open or high resistance in both the return and control circuits. 7: This step refers to transfer case shift control module replacement. 8: This step refers to encoder motor replacement. DTC C0388 Step Action Value (s) Yes No Schematic Reference: Transfer Case Control Schematics 1 Did you perform the Diagnostic - Go to Step 2 Go to 2 1. Disconnect the rear differential lock harness 2. With a DMM, measure the resistance of the rear Was the resistance reading within 2.2-4.3 ohms Go to Step 3 Go to Step 8 With the connector still
2007 Hummer H3 2007 Driveline/Axle Rear Drive Axle - H3
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