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The relay is located in the under hood fuse / relay box . Marked HORN PCB relay , If you change it out an horn still doesn't work ,you can test to see what is missing right at the relay . Two of the pins at the relay socket should have battery + , one should be open an the other should show ground 0 ohm's . If you look on the side of the relay there is a diagram of the pins. 30, is Battery +, 87 goes to the horn . When you push the horn button on the steering wheel it causes the relay coil to energize closing the contacts in the relay sending power from pin 30 to pin 87 down to the horn turning it on ! Pins 85 an 86 are the control side , one should have battery + an other should be open , till someone pushes the horn button . You can test for power with volt meter an test with ohm meter for ground on the one , an a open on the other one, an have someone push the horn button an it should change to 0 ohm's .
The horn(s) are buried behind grill. You have to disassemble grill and a ton of hardware by AC condenser and fans. Horns are mounted on front side of radiator support.
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