Light Switch & Horn Button Fits Case David Brown 1194 1290 1390 1490 1594 1690One New Aftermarket Replacement Light Switch and Horn Button Fits Case David Brown Tractors This combination rotary light switch with integrated horn push button replaces the original Fits Lucas style switch found on Fits Case IH and David Brown (Fits Case David Brown) agricultural tractors. The switch controls lighting circuits through multiple positions (Off On On On) and includes a separate push button for the horn, making it a direct drop in