Position in car of the horn relay

Without knowing the car, the generic answer is to start at the fusebox and see if the fuse is blown. If it's good, check the horn relay. If it clicks and you get 12v coming out of it with the horn installed then, check the horn itself by hitting it with 12v. If the relay does not click (presuming it's not solid state) then you'll have to check the round contactor at the steering column which allows the wheel to turn multiple turns and still pass the signal. While you've got it apart, check the horn switch. If all those components work (including the horn) but the horn still does not sound when you hit the switch, check for a bad grounding wire from the horn.

It needs to be grounded to some metal part on the car. If the mount is rusted or broken you can drill a hole on the horn its self and attach a wire to it using a metal screw then attach the other end to something metal on the car.

The horns themselves, as well as the electrical relays, can often be replaced with a standard ones from one of the auto parts stores. If parts are not available for the horn switch, An different switch, again from the parts store, can be installed or one obtained for a salvage yard.

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

as with all elect. fails check all fuses
in this case the 15 amp fuse marked, HORN
can i presume all else works good> car drives.?
all answers, USA spec car. nobody ever tells location, so..... if not USA< all answers wrong. the usa car has just 1 horn.....
got voltage to horn? 12v
Yes or no.?
if yes horn bad.
got voltage from horn relay
yes, bad wires.from, relay to horn
no, got voltage 12v to horn relay coil,
yes, good, no bad fuse.
got 0v to other relay coil (all tests honking)
yes, bad relay.
no, bad horns switch.

if you want me to guess. sure.
1: bad wires ../connections, end to end.
2 bad horn
3: bad relay
4: bad horn switch.

HI,
Try to find out first what is the part that cause the malfunction of the horn.
The three major part of the horn is the relay, harness & horn pad, and horn itself.
Check the relay if it is functioning by replacing it with similar type ( if you have the spare or a similar relay in the relay/fuse box in engine compartment ). Let somebody push the pad horn and if you hear a clicking sound on the relay, it means there is a current that activates the relay( no probs from the horn pad and harness ).
Check the horn, just get a wire and directly connect it to the positive pole of the battery and connect it( wire ) to the positive terminal of the horn, it should activate the horn, if not the problem is the horn and you have to replace it.

Hope that helps!

Hi!

Go to the fuse box and check for the fuse and see if its blown.

fuse box under hood

try heel plate fuse boxes two of them under rear seats unscrew on carpet where backs of feet position when passenger sits correctly

the problem will most likly be the pick up ring on the steering wheel give it a good clean