What shall I check on our '62 300 to have both horns blow all the time? Usually only the High Tone horn blows, though sometimes the Low Tone horn will chime in. I've replaced the secret ground strap at the base of the steering column. Matt Allyn Exec. in Charge of Prod. Granada America 323-785-2129 office 323-785-2151 fax 562-533-2551 cell