Question about Ford Cars & Trucks
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Posted on Jan 02, 2017
The wire connection conecting the horn and the batteries are not in a a good condition so firstly check them out and then for good sound also replace your horn with a new one because in low current or false use the horn might be damaged.
Posted on Sep 22, 2009
I would trace the wire from the horn and see if it was inadvertently damaged when the alternator was installed. If you have a voltmeter, you can remove the horn fuse and check to see if there is continuity between the horn (non hot side) of the fuse and the car body. This would indicate a short in the wire running from the fuse box to the horn. You can also look around the alternator mounting area to see if any wires are being pinched. Hope this helps. Good luck!
Posted on Mar 10, 2010
SOURCE: Why is my 2008 Ford
A couple of things to try,
1) Change the air filter if its not been done recently.
2) Try a cleaning agent which you put in the fuel tank such as Redex.
3) If you do a lot of short runs, give it a good long run going a fast as is legal to get the
engine up to a good running temperature for a while.
Posted on Apr 18, 2011
SOURCE: 2008 ford focus horn
Well it depends on what you tested in the circuit most horns are vary simple they have a 12 volt wire hot and it goes through the horn to ground . If you put your muilty meter on OHMS and touch the red lead to the +side on the horn and the black lead to the ground side the meter should read 000 or vary low resistance if not go to the frame with the black lead if it reads 000 or differane from the last test then the horn is bad. Next test the power supply to the horn so put the meter on the 20 volt DC. scale unplug the wires from the horn and see if you have 12 volts or any voltage comeing to the horn you may have to turn the key to run depending on how its wires but if the blinkers work the horn should to . You likely have more then 1 horn so look around in there make sure of what your doing or the tests will be no good . If you have no power at this point check the fuse box for a burnt out fuse it won't be a big amp fuse mabey 10 amps and may not say horn. Im sorry i don't know exactly ware the relay is on a 2008 focus but it would be in whats called a relay center witch you likely would be able to find in the oweners manual in the glove box . But the horn is rarely used and most likely a connection problem they tend to be low on the vehicle and get wet along with road salts in the winter depending ware you live can get corroided . But if your going to test make sure the test is going to give you the information you need to correctly daigonis the problem Good luck
Posted on Jun 30, 2012
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