The 12 Volt 5 Prong Headlight Relay can be used in 1966 and later model VW Beetles, Super Beetles, Karmann Ghias, Type 2 Bus Models, Type 3s and Things. The 5 prong headlight relay has a 30 terminal that 4 prong headlight relays do not have. Power must be supplied to the 30 terminal (either from the fuse box or with a jumper from the 56 wire) for the headlight relay to work. The wiring terminal designations for the VW Headlight Relay is:56 - Power from the Headlight Switch56a - Power to the High Beam Terminal on the Fuse Box56b or "F" - Power to the Low Beam Terminal on the Fuse Box30 - Power from 56 terminalS - Momentary Ground from Turn Signal SwitchVW Factory Color Codes:56 - White with Black Stripe56a - White56b or "F" - YellowS - Brown with White Stripe30 - RedThe relay MUST HAVE POWER to the #30 terminal to operate. If your wiring does not have a power wire to the #30 terminal a "jumper" wire can be run from the #56 terminal to the #30 terminal. 111941583BR 111 941 583BR 98-9437-B