blue wire

from Jargon File (4.4.4, 14 Aug 2003)
blue wire
 n.

   [IBM] Patch wires (esp. 30 AWG gauge) added to circuit boards at the
   factory to correct design or fabrication problems. Blue wire is not
   necessarily blue, the term describes function rather than color. These
   may be necessary if there hasn't been time to design and qualify
   another board version. In Great Britain this can be bodge wire, after
   mainstream slang bodge for a clumsy improvisation or sloppy job of
   work. Compare {purple wire}, {red wire}, {yellow wire}, {pink wire}.
    
from The Free On-line Dictionary of Computing (8 July 2008)
blue wire

   (IBM) Patch wires added to circuit boards at the factory to
   correct design or fabrication problems.  These may be
   necessary if there hasn't been time to design and qualify
   another board version.

   Compare {purple wire}, {red wire}, {yellow wire}.

   [{Jargon File}]

   (1994-11-29)
    

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