I recently went to start up my 1967 mustang coupe after about three months of sitting in the garage, but when I turned the key nothing happened, there was absolutely no noise. I hooked up the charger assuming the battery was dead and the charger immediately Indicated that it had a full charge, so I tried to start it again with the charger hooked up and this time got a weird buzzing/clicking noise coming from the solenoid, but again it didn't start. I replaced the solenoid and battery cable brackets that connect to the battery terminals and still had the same problem. The battery is about two years old, and when I checked it with a multimeter it read 11.9, so I'm not sure if it is the battery or something else.