My horn on my 1990 Pontiac Bonneville LE keeps blowing. Only way to stop it is to disconnect the battery. So now how do I disconnect or disable the factory horn so I can reconnect the battery and drive it to a mechanic?

Unplug the horn, or simply cut the wires, and splice them back later. Or check your owner'* manual and pull the fuse. Just make sure that fuse doesn't power anything else you might need.

I checked the owner'* manual and there is no fuse associated with the horn. I looked under the hood, but I can't locate the horn without a service manual diagram. Anyone got a diagram? Or some direction like right side of engine on the body wall?

Look in between the rad and the grill on the passenger side.

there are two horns on the 87-91 bonnevilles. on next to the battery, and one on the drivers side in the same spot. there is one connector on each, simply unplug the connector on both horns!

Plug it in and follow the noise.... :?

If he could plug it back it, he would obviously know where to unplug it in the first place! :?

The fuse for my 91'* horn is shared w/ the fog lights.
It'* in the fuse box in the glove compartment box.

I forget the # of the fuse.... I can look it up later if you need.

the way the horn is activated in our cars is that first, under the steering wheel'* front cover there a little metal rod with a spring under it. When you push the wheel cover down some it makes contact. What does it make contact to? Well if you remove the steering wheel and the lock plate. now you will see in the center of everything a plastic plate /tube. (the base + a small short little tube like plastic part that comes out of it). It'* all one piece though. Anyway the plastic base has some copper on it that makes contact with ground (in this case almost anything metal around it. Anyway to make a long story short (aka i'm not exactly sure of all the specifics but i remember figuring it out when i looked at it), the pushing down of that little rod under the wheel cover just completes the circuit. Almost any loose metal clips could complete this circuit and activate the horn. While I was working on my steering wheel one of the turn signal activating metal clips got lose and was tangled aroudn the lock plate and the plastic horn activator thing and thus the horn just went on and on and on and on.

i'm guesing maybe something is amiss under your wheel.

-Mike D
p.*. please correct me if i'm wrong.

I mean plug the battery back in so it would go off..

Although legally you'll need a horn to pass inspections or whatever. It'* part of mandatory equipment.