No Shift From H2 To H4
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Open 4WD fuse. Wiring harness open, shorted or pinched. Faulty touch select 2-4 switch. VSS inoperative or inaccurate. 4WD position switch inoperative or inaccurate. H4 indicator light circuit faulty. Transfer shift actuator malfunction. ADD control system faulty. 4WD control ECU malfunction. Transfer case mechanical malfunction.