Connection cable having cover member and locking member

A connection cable for interconnecting a high intensity discharge (HID) bulb and a circuit unit, comprising:

• a cable-side connector electrically connected to a bulb-side connector provided in the HID bulb;
• a cable body connected to the cable-side connector;
• a cover member configured to surround an outer circumferential surface of the cable-side connector with a connection terminal surface of the cable-side connector exposed;
• and
• a locking member configured to bring the cover member into engagement with the bulb-side connector, wherein
• the cover member is configured to define a gap between the cable-side connector and the cover member such that the bulb-side connector is fitted to the gap when the cable-side connector is connected to the bulb-side connector,
• the locking member includes a slide portion arranged to slide along an outer circumferential surface of the cover member,
• the slide portion is provided with a protrusion extending through the cover member and engaging with a locking hole provided in the bulb-side connector, and
• the slide portion is configured such that, when the slide portion is caused to slide, the protrusion is moved away from the cable-side connector and disengaged from the locking hole.