I've some problem with one of the horn of my '57. It's an Autolite. This horn blows one or 2 times then fails. After a while (2 or 3 mn) it blows again 2 or 3 (short) times. Etc.. I remove the cover and try to adjust the small screw: blows again then fails, i unscrew (or screw) a little the adj. screw and same results... I've spent 1 hours w/o good results... It seems that when the resistor is too hot then the horn fails. What's the purpose of this resistor (0.5 ohm) ? Protection ? Seems that with temperature the value of the resistor changes so the adjustement goes wrong. Could i short the resistor (and adjust the sound) w/o burning the coil ? Note that the 2 other horns work well .. -- Philippe COURANT (Pau, France)- Webmaster des sites ACCF et C-I-F Imperial 1957 Crown convertible Buick 1996 Roadmaster wagon - American Car Club de France (ACCF) : http://www.accf.com - Chrysler Imperial France (C-I-F) : http://www.ifrance.com/c-i-f - Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad - SportsCars : http://www.ifrance.com/accf-sprtcar