The TCC wire is purple with a white tracer. Is the wire you have a solid purple or purple with white tracer? The wiper leads goes into cab in same area as convenience block.
My 92 truck is 5 speed and has a few weather pack connectors (Think that's what they're called) that are not connected to anything and just hang loose. I don't think (maybe wrong) GM had different
wiring harness back then. If wrong someone please correct.