If you want to install 2 sped wiper to your old mustang, this Mustang wiring diagram maybe needed. Of course, you need a harness. This is 1965 Mustang interior lighting wiring diagram, windshield wiper wiring diagram, and gauges wiring diagram. All of that become one in this Mustang wiring diagram electrical schematic. You can see connections of wires and parts between windshield wiper and windshield washer switch, water temperature sending unit, starter relay, rear courtesy light, transmission selector dial lights, and more. Full 1965 Mustang 1965 Mustang Interior Lighting Wipers Gauge Wiring Diagram here.
