In a message dated 2/9/2004 5:28:13 AM Eastern Standard Time,
[log in to unmask] writes:
I'm replacing a power supply fan in a Pentium AT computer it has a red and
black wire which I need to change the connector to the new one which has a
red, black & blue wire. Do I need to connect the blue wire somewhere - is
it a ground?

Harvey Rose
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Hi,
  The third wire is a tachometer wire, it get used on newer motherboards to
measure the speed of the fan. You can just leave it disconnected if your
motherboard does not have that option.

HTH,
Peter Hogan
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