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together. 7: This step determines if the coil or pigtail is shorted to ground. 8: This step determines if either the differential lock control or differential lock return 9: This step tests for an open or high resistance in both the return and control circuits. 10: This step refers to transfer case shift control module replacement. 11: This step refers to encoder motor replacement. 12: This step replaces the transfer case shift control switch. Electronic Rear Differential Lock Will Not Engage Step Action Value (s) Yes No Schematic Reference: Differential Lock Schematics 1 Did you perform the Diagnostic - Go to Step 2 Go to 2 Verify the fault is present. - Go to Testing Go to Step 3 3 While observing the rear axle - Go to Step 6 Go to Step 4 1. With a DMM, check the resistance of the transfer 2. While depressing and holding the differential lock
2007 Hummer H3 2007 Driveline/Axle Rear Drive Axle - H3
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