Request help identifying non-ECM wire in '89 305

[gl18rider]

I guess there are 2 purple wires in the convenience block. We have the starter solenoid wire identified. It's the other we're not sure of. From the inside of the truck, it would be in the upper left of the lower block. Does that help?
thanks for checking.

[Old Nash]

I have Chilton manual that show 2 purple wires from ECM. A11 to Map Sensor and D7 to Oxygen Sensor.

[classic79]

I think one should be the TCC brake switch wire.

[gl18rider]

Old Nash: Yep, I have those figured. There are 2 others going into the convenience block on the drivers side. 1 is the starter solenoid, and the other is ??
classic79: TCC? What's that?
Thanks for the help guys. This is a great forum.
-gl18rider

[Old Nash]

I can't read, I see your post that you had these figured out. I see there is purple wire that goes from the windshield wiper motor to windshield wiper switch. Have you check that?
TCC -Torque Converter Control

[gl18rider]

I'll check the wipers, but I don't think they got disconnected. It should be just the engine connections.
re: TCC, would a manual truck be wired for it and left loose?

[Old Nash]

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.