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horn fuse is blown, locate fuse box, sometimes there are 2 , one in car and 1 under hood, engine compartment.
use your cars manual to see horn fuse and replace with same fuse.
If the fuse is burned out, replace it. Try the horn again. Check your car owner's manual for the location and type of fuse. Check whether there is any debris obstructing the horn button on your steering wheel that may be preventing the horn from sounding
Is there voltage at the horn that is switched by the button on the steering wheel? is it grounded well? If so, you need a new horn. If not, chase the signal with a multimeter. Easy peasy fix.
Check the fuse, good? Switch relays with a known good relay of the same type, still no good? Check for power at the horn, should be 12v present with horn applied. If so, you need a new horn.
On the 2001 jaguar under the hood in that fuse box the no. 4 fuse is to the horn relay it is a blue 15 amp fuse if this is not the one inside parssenger comp. the no. 28 fuse is to the security system horn relay hope this will help you on my 2001 fuse box is on passenger side
it is behind and under the left front headlight. depending on what year you have, a generic parts store horn or one from a junkyard will work. the 96-99 horn had a built in relay, so you can only replace with a like horn. if you have 3 wires, then it is a built in relay type. if it is not a built in relay type get a new relay at a parts store and try replacing that first. it is in the fuse panel. horn switches in the steering wheel have been known to go bad also, but steering wheel problems are usually horn going off when turning.
If you do not have the 3 wire type. trying jumping the battery voltage directly to the horn. if it beeps then it is not your problem.
Remove and replace the Horn Relay. There should be a Spare Relay of the same Type (Size and Shape). OR
Switch out the suspected Horn Relay with another Relay in the Fuse/Relay of the same Type (Size and Shape) that is known to currently work. After the switch check the operations of both the Horn and the function you switched out. If the Horn works and the other function doesn't work any longer: The Relay was bad and needs to be replaced.
The horn is located in the front bump on the drivers side. You'll need the remove the side cap to access the horn itself. As for the fuse, check under your dash on the drivers side. You will see the fuse box. Printed in white type up-bove each slot, should indicate which one the fuse watches, there should be one for horn. If you can't find it, then one by one remove the fuses and check to see if any have blown.
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