Field Coils

Check with 110 volt test lamp. The shunt field coil terminal must be disconnected from ground and lead insulated from frame. Place one test lamp lead on field connector strap, touch other test lead to field frame. If lamp lights, one or more coils are grounded. Check for opens by placing one test lead to field connector strap, touch other test lead to field coil brush connector leads (check series coils and shunt coil separately at appropriate terminals). If lamp does not light, coils are open.