1989 Dodge Caravan oil light comes on sometimes, usually whe

Engine problem
1989 Dodge Caravan V6 Front Wheel Drive Automatic 187000 miles

Oil pressure lights comes on just started doing it got an oil change Still comes on sometimes. Started having problems after I had my battery jumbed. A wire got burned off, the one going into the electrical control panel. My lights on the heater blink every time I turn on the car stop about 10 min later Then the oil pressure light comes on at anywhere from 1400 to 700 RPM. Driving on Highway at 65 miles an hour no light.

Is my oil going or could be something else?