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Re: 98 suburban electronic transfer case won't shift
That code (U1026) indicates a loss of communication on the Class 2 Serial Data system from the ATCM (Automatic Transfer case Control Module). This can be caused by loose connections, bad pins, shorted wires, etc. It can also be caused by a loss of power to the ATCM.
3 fuses supply power to the ATCM. All are in the I/P fuse block.
1. Gauges--Fuse #4 10a (hot in run)
2. 4WD--#24 20a (hot in run)
3. T Case--#2 20a (hot at all times)
REPLACE these fuses, even though they may look good, and post back.
PS: Should have said replace one fuse at a time starting with the T Case then the 4WD and last (though I doubt it) the Guages fuse.
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57 Chevy 210
65 Olds 442 Convertible (Another one sold)
75 GMC Vandura 3/4 Ton
1999 K2500 Old Body Style Suburban (Gone but not forgotten)
05 Dodge Ram 3500/5.9 Cummins
2012 Toyota FJ Cruiser
Last edited by 777stickman; 07-10-2007 at 06:53 PM.
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