SHELBY GT 350 Member
Joined: Sep 2010
Location: see user name
Probably dirty contacts in the switch, or just bad switch altogether. Mine does the same thing occasionally, just never been bad enough to inspire me to tear out the center console in order to deal with it.
2001 GT Convertible
All the usual bolt-on's /200 I6, C4
And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4