2000 mercury grand marquis horn doesn't work. Fuse 5 and relay 2 are ok. Where is the horn located? Is there any other fuses in the circuit for the horn?

Here is your Fuse Box Diagram.

Mercury Grand Marquis (2003-2011) fuses and relays

https://fuse-box.info > mercury > mercury-grand-marq...

The fuse box is located under the left side of the instrument panel. The location of the fuses in the passenger compartment: Mercury Grand Marquis (2003- ...

https://www.google.com/search?q=2003+Mercury+Grand+Marquis.+Power+point+fuse+location

..

Take an electric meter and test the horn relay.
This part is found under the hood, inside the black plastic fuse/circuit breaker box.
God bless your efforts.

Hi Debbie,here's a link on your horn location, Where is the horn located on 1997 Mercury Grand Marquis Aside from behind...

A horn relay will be located under the hood in the fuse/relay block. Check in your owners manual under fuse/relay to see a diagram. If you have no manual go to BBB Industries online under technical bulletins and wiring diagrams to look up your exact year

In fuse block. Ok, that's a smart a** answer. Not sure where the fuse block is located on your vehicle, but usually under dash left of steering column, or under hood on inner fender, or in glove box, or? Using a flashlite you can often see which fuse is blown by eyeball. If not, remove one at a time and examine. Other reason for horn to fail is horn relay bad. If only one horn fails, bad horn. Both fail = relay or fuse or broken wire.

Could be the horn pad, horn relay, fuse, or the horn itself.
I would check the fuse first.

The horn RELAY is located at the Right Hand front of the engine compartment, in the engine compartment fuse box...Here is a picture of the location ... hope this helps you ??

I replaced the horn relay which is located inside of fuse panel under the hood of car on the firewall, have someone push button to be able to hear a clicking sound coming out of the correct relay, then trade out relay of the same and see if horn works

From the 1997 Mercury Grand Marquis 4.6L SFI 8cyl repair manual, the Flasher is located behind left side of instrument panel. The turn signal and emergency flashers are attached to the interior fuse panel. They are replaced in the same manner as the fuses and circuit breakers.



Fig. 6: 1995-97 models interior fuse box locations (click for zoom)

Hope helps (remember rated this).

Your horn works off of the engine compartment fuse box. There will be Maxi fuses and regular fuses in it. The regular fuses there is one 15 amp fuse that fuse is for your horn relay. I don't know what direction they go in but it will be the 5th fuse in that row. Right next to that row of fuses there will be a row of Maxi fuses they should go in this order a 50, 50,40,30,50,40,30. In this same direction of fuses the # 2 relay in this order is your relay for your horn. If you remove this relay you should have 12 volts on 2 of these wires. There should only be 4 pins that are used in that relay even though it has for pins. The 2 power wires both work off of the #5 i5 amp fuse in the engine compartment. If you have power on 2 wires at the relay when it is removed then you will need to chack all the other wires where the relay is for a ground when someone holds the horn button down for you to check. If you have a ground when the horn button is depressed then the other terminal that is left in the relay that you removed I need you to take one of the power wires that has 12 volts and jump it over to that other terminal that is n't the ground wire for your horn when the pad is depressed. If the horn goes off then every thing is ok with that circuit then the relay has probably failed switch it with a simular looking relay in the engine compartment fuse panel then see if your horn works properly. If you don't have a ground at one of the terminals when someone holds the horn pad down. Then the problem is probably between the horn pad and the relay more then likely it is your clock spring in your steering column. Let me know if you need any more information then this.