The ABS computer uses the VSS signal as one of its several inputs. If the VSS signal is incorrect, the ABS computer will be forced offline and the ABS light will be turned on.
Based on your description, the sound may be the TOB rattling.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
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