Back history first.
88XJ auto engine harness swap.
Never had any cooling issues since I bought it.
I have never seen the electric fan come on.
This started with an O2 sensor change to replace a non responsive factory unit.
After r&r of the exhaust manifold to repair a buggered up thread for the O2 sensor, I come across this tucked away in the corner. Which set is the fan and coolant temp sensor and what are the others? One set comes from the large loom the other from the small. Also any ideas on what the red wire wired to the red with black trace in the small harness would be about?