Recheck the pics I sent you of the TCS on the gutter. If you notice, the green wire is wadded up, rerouted through the gutter a ways, then junctions up to another single green wire that goes to the drivers side head if, as Marlin said, you have the idiot light setup. The car did have that setup from new, but Earl changed that as thats where the sending unit is now for the SW gauges. There should be a plug on the pass side that will need to be replaced with a TCS sending unit, and connected to the green wire that is supplied with the new harness. It is only for the TCS, not the idiot light.
In the day, we didn't bother messing with reconnecting the TCS after putting in the gauges. Damn thing kept the secondaries from opening as quick as we wanted. Smog stuff took horsepower. It needed to leave.