I have trouble with my S10 Blazer-98 the 4wd dont work. Its not
possible to shift betwen 2hi 4hi and 4lo. I tryed to change the motor
and encoder on the transfercase but still the same problem. I only get
light on 2Hi pushbutton and somethimes on 4Lo.
My 1995 S-10 Blazer did the exact same thing. The dealer reset the computer
by disconnecting the negative terminal of the battery for a few seconds (and
of course charged me 45 bucks!) His explanation was that if you cycle
through the different modes on the switches too quickly, you can lock up the
computer for the function. I think I caused mine when I was reaching for
the 4 Hi switch and hit a bump in the road. It caused my finger to "double
bang" the switch. After the reset, no problems were noted. Hopefully that
is all it is.
Thanks for posting this! My 1994 S-10 pickup 4WD hiccuped 2 nights ago
when I tried to shift out of 4H to 2H. It eventually shifted to 2H but
since then would not engage either 4H or 4L. I was preparing myself to
tear into that actuator motor replacement job when I found your post.
I pulled the battery cable for a minute or so, reconnected and voila,
everthing is working perfectly again. :-)
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