if your horn doesn't work could it be the air bag on the steering wheel
under hood left side
Under the hood on the passenger side by the firewall there is a row of four relays. Counting from the passenger fender inward it would be the third.
It's under the hood, on the firewall, passenger's side, right behind where the alternator is. It's covered by a gray plastic cover.
There is one under the hood next to the cowl and there is one under the dash on the driver's side.
In the front, you have to reach the lights from under the hood, pull out the assembly it's in and change the bulb. In the back, you can remove the panels from inside the trunk and do the same thing. The back is much easier than the front.
To open the hood latch on a 1968 Buick Skylark, first, locate the interior hood release lever, which is typically found on the driver’s side, near the bottom of the dashboard. Pull the lever to release the primary latch. Then, go to the front of the car, slide your hand under the center of the hood, and locate the secondary latch, which you need to push or lift to fully release the hood. Once released, you can lift the hood up and secure it with the prop rod if necessary.
It is under a plastic cover behind the passenger side headlamp assembly.
There's a big, black plastic cover over the blower motor under the hood under the firewall. It's just behind the alternator.
Not 100% sure, but try starting the fan, open the hood and listen for it.
If it's a V-6, it's at the bottom of the serpentine belt. There should be a diagram of the belt on a label where the passenger's side shock absorber is, under the hood.
This can be rather tuff........you must grab the hood release cable from the underside of the vehicle. Sometimes, you can trip open the hood latch with a long screwdriver, if you know where to do it.
in the front of the car right above where a plate should go there is a little handle that you pull toward's you and pull up on the hood at the same time