1990 Chrysler Minivan & Dodge Caravan - Negative Battery Harness to alternator - Mopar # 4481115
 
According to Chrysler this fits:  1990 Chrysler Minivan (Dodge Caravan or Plymouth Voyager) with a 3.3L V6.
 
This harness goes to your:
Alternator
Throttle body (has connectors for both your AIS motor and TPS sensor)
a 4 wire connector that looks like a 4 wire o2 connector or possibly a connector for the Coil
an Air Temp Sensor connector
MAP sensor
Plugs into the main harness near the battery and contains the main ground ring terminal 
 
New Mopar.