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Old 08-06-2010, 12:03 AM   #4
cableguy0
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Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
Re: Using an electronic speedo with TBI and 700R4?

It looks to me like B3 is the speed sensor itself. The other wires look to be shared so they will be ground power and possible for the dash light.
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