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I have a 1968 SS Chevelle and was wondering if someone could explain or tell me what is wrong. When I open the driver's side door a buzzing sound goes off until the door is closed. This happens without a key in the ignition. Is it a warning of some sort or is something not quite right. Don't know where to start to look. Thanks in advance for your help.
 

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1969 Chevelle 2 Door Sport Coupe Malibu COPO clone
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:cool: Eh, first track down the buzzing sound, eh? If it's coming from under the hood look at the horn relay and/or the voltage regulator. If it's coming from the passenger compartment, it could be your "Keys-in-Ignition" sensor -- it might be "busted." Or maybe a "head lamps on" warning buzzer has gone "south," take a look by the fuse box.
 

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Tom,
'68 was the first year for the key warning buzzer. Keys left in the ignition (in the off or accessory position) would result in the horn relay buzzing as a warning to the driver when the driver's side door was open on a stock-wired car.

Most people simply defeat the system. Your horn relay is located in the driver's side right next to the radiator, near the top. If you disconnect the black/pink wire plugging into the bottom the buzzing should stop. The solid black wire plugging into the bottom triggers the horns--leave that alone.

Try that.

If you want to restore the correct functionality, post back and we can step you through the wiring checks.
 
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