Where is the horn located under the hood of 1990 chevy pickup

I looked at info for a Silverado 1500. Use a test light to check for voltage at horn fuse in under hood fuse box. According to this diagram, the horn relay has to be energized. Have a helper hit the horn switch when you check voltage at horn fuse. If hot, have to check wiring circuit to horn. In the diagram, dark green wire is voltage and black wire is ground. You could actually use jumper wires from battery for voltage and ground to horn, for testing.

Horn is under the front headlight light, which would have to be removed to access or pull the front wheel well liners out and look in just below the running lights. I believe 2 horns.
2008 GMC Sierra Horn Location

horn location

thats because its behind the front bumper ,you will have to remove the plastic covers to gain access

the horns are on the drivers side behind the grill

on the firewall with the other relays under the hood near the battery, it'll have a light green wire as the sme color as the wire that hooks to the horn. The fuse is in the under dash fuse panel. if the fuse is good you can repeated ly hit the horn button and listen for or feel by touch the relay as it clicks. The horns fail more often than the relay and the relay will work to run other things so it could be removed if the rely was used for thre fuel pump or something else.

There are 2 horns, 1 under each headlight behind the bumper.

Hi RS,

The horn on my 86 Cherokee is inside the grill, in front of and to the right of the radiator. I don't imagine they've moved them too far from there in four years.

If you're trying to locate it for reasons other than it not working, I'd say have someone sound the horn while you stand in front of the car. That should pin point it.

Best regards

Mike

Horns are usually located under the hood near the front fenders and behind the headlights.

Have a friend, (or in-law) someone you're not too fond of, stand in front of the truck while you honk the horn and have them pinpoint it for you.