PIAA 004 Series - Manual (Page 7)

LAMP SERVICE
The PIAA 004 lamps have a replaceable H3 style bulb.
Use only 12V-H3-55 Watt bulbs.
Snap front lens unit off from housing. Be careful not to pull too hard and
damage wires.
When service is complete snap lens unit back onto housing being careful not to
pinch any wires.
Slide insulator over connector.
ground wire
insulator
power wire
bulb 12V-H3-55W
push clip to release bulb