I have a 1996 Buick Regal Grand Sport. The horn switch is I have a 1996 Buick Regal Grand Sport. The horn switch is shorted. I want to install a separate switch and use the exsisting wiring but I have been unable to find the horn in the wiring diagrams. buick regal horn | eBay www›Search›buick regal hornHorn Contact Wire and Spring for GM Column Hot Street Rod CHEVY MOPAR Custom. For 1976-1988 Buick Regal Horn Connector Dorman 25822HS 1983 1978 1977 1979 1980 See more like this. Horn Contact Plate 96 Buick Regal Gran Sport 4 Dr 3.8 V6 OEM See more like this.