It's the circuit breaker who breaks the circuit : too much amperage (i.e halogen bulbs or a grounded bulb or a too thin wiring) or breaker needs replacement. Don't know where is the breaker ; in '57 it's a built-in affair in the switch. I've a friend who has a '66 cad%"*ac and he has the same problem; he has halogen sealed beams and when he put high beams on, the breaker cut after 15 or 20 s. -- Philippe COURANT (Pau, France) Imperial 57 Crown convertible Buick 58 Roadmaster sedan - American Car Club de France (ACCF) : http://www.accf.com - Chrysler Imperial France : http://www.ifrance.com/c-i-f - Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad - SportsCars : http://www.ifrance.com/accf-sprtcar