Air conditioning clutch relay.
rear wiper, rear defrost
A swivel spark plug socket will let you get to #1.
I need a routing diagram for the serpentine belt on a 1998 Jeep Wranger, 4 cylinder, with air conditioning
You don't. There never was a 1996 Jeep Wrangler.
It controls all aspects of the engine, alternator, air conditioning, cruise control.
I am pretty sure that's the air conditioning button, it should be right up there on the heater/ac controls.
That knob controls the location of the air output. The snowflake spots are for air conditioning.
A 2002 Jeep Wrangler does not have a mass airflow sensor.