According to the diagram for a 97T with A/T there are 2 data links. Data link 1 is located on the drivers side of the engine and is fed from the battery, through the EFI 15A fuse in the block under the hood,then throught the EFI relay (which is turned on by the ign key)to a white wire with a red stripe on the data connector. The brown wire is ground and the violet/white goes to the ECU.

Data Link 3 is located in the lower center part of the dash and is powered by the EFI fuse through the 7.5 A OBD2 fuse in the left kick panel to a violet wire to that connector. Brown and white/black go to ground. White goes to the ECU. So far I have not had to screw with these so I can't give you anything else. Hope this helps.