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How do I wire up twin snail horns & relay. 1970 Negative earth vehicle.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 165 Answers

SOURCE: Is the 1988 twin-cab 4x4 a 12v negative earth ?

yes it is.

Posted on Oct 26, 2009

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SOURCE: im in the process of wiring an air horn to my 2008

check your ground and clean it , also check your power source you may have 12v but not enough amps to make it work if you are using the standard horn power trying to run an airhorn motor may not be enough but most likely would be a ground problem

Posted on Jul 11, 2010

  • 24 Answers

SOURCE: 99 dodge durango. My horn keeps blowing the 20 amp

could be you might check it out. many items take the same relay so you might try exchanging it with another one with the same numbers. If that isn't it you may have a short in the horn itself.

Posted on Aug 11, 2010

  • 1 Answer

SOURCE: how to wire a harry moss air horne relay to

If the compressor has 3 air connections on top then the two lower terminals with nuts are the + and - supply inputs to the compressor motor. The two top spade terminals power a solenoid valve which changes a triple sequence (illegal?) to a combined blended triple tone. I don't think polarity is an issue but to check this connect a 12V battery -ve to the mounting bracket on the compressor. Attach 2 wires to a headlamp bulb and connect one to battery +ve. Then touch the spare wire to each of the 4 terminals in turn. If the bulb lights that terminal is at compressor ground. You can determine the operation of the relay in the same way. Between 2 terminals the relay will operate. Note those and then test each to the relay bracket to see if one side of the coil is grounded. By powering the relay directly from the battery you can then use the bulb to determine which contacts are 'made' when the relay operates. You will need a relay to control power to the motor. The solenoid valve probably only takes a couple of amps. You could run both the motor and the solenoid valve from the same relay if you just wanted a blended composite tone.

Posted on Sep 30, 2010

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SOURCE: 2003 dodge caravan airbag good

if you check the wire that comes from the horn button to the relay for voltage when the horn is pushed and have voltage then you have a bad relay,if not then you probably have bad contacts in the horn pad area or even the clock spring itself.

Posted on Mar 18, 2011

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1 Answer

2007 Ford Explorer horn quit working?


suggest checking if 12 volts goes to horn wire at horn end when horn pressed from inside vehicle. A 12 Volt probe {google it} can be a cheap checking tool for this.
If 12v volts is switched when button is pressed {could be earth being switched if it is then place probe on constant 12 volts and negative lead on switched earth wire} then the horn itself is faulty.
If no voltage switched then horn relay needs to be checked. check if voltage at horn relay coil contact when button pressed.
if yes then relay may be faulty. if no then horn switch could be faulty.
you can check switched voltage also at horn relay switched contact when relay plugged in. To see if relay is doing what it is meant to do

Jan 16, 2017 | 2007 Ford Explorer

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How to check horn. Do I remove the covering on the steering wheel or is it in the engine compartment.


Switch is in the steering wheel. The horn itself is in the engine compartment to one side of the radiator, between the radiator and front grill. Usually on the drivers side.

More likely to be the horn that is faulty as it is in a pretty hostile place with water and salt spray. Test it by putting a wire from the battery to the horn contact. The one to earth will cause a spark, the other one should make it sound.

Dec 16, 2015 | Cars & Trucks

1 Answer

2000 Nissan frontier- I'm trying to rig a horn


You Have Got A Direct Short
Does Your Horn Have Two Connections Too It?
If It Does Then Swop Your Wires Around And Try Again
Is You Vehicle Positive Or Negative Earth?Try Removing Horn From Vehicle And Test It On The Bench First!!
Let Me Know How You Get Along.
Good Luck

Mar 18, 2013 | Cars & Trucks

1 Answer

Hyundai x2 Horn will not stop blowing


First check for faulty horn relay. If OK then check Horn pad, it is an earth switch and may be dammaged. Remove horn pad and check for wire off and contacting to earth or short to earth . If problem still exists with horn pad removed then the wire from horn relay to steering column is earthing out

Nov 24, 2012 | Cars & Trucks

1 Answer

I just took a long trip, parked my car then in about 20 minutes the horn just started to go off any Ideas



  • remove the fuse for the horn, or disconnect the negative terminal on your car and then pull the live wire from the back of your horn which is located behind your grill - looks like a snail shell. good luck.


  • Mar 05, 2011 | 1995 Honda Accord

    1 Answer

    Horn , power windows and sunroof all stoped working on 2007 changed horn fuse and as soon as i used the horn the fuse blew again


    This wold indicate that you have a shorted horn circuit. Generally, the horn circuit has a negative contact at the steering wheel, meaning when you push the button, it grounds (-) the sysem causing the relay out in the engine compartment area to provide 12V (+) directly to the horn. If nothing else causes the fuse to blow, the pwr window/sunroof., then either the relay itself is shorting out or a wire to the horn is grounding, or you have a bad horn. (spend a few fuses & save time, unplug the relay, replace the fuse & press the horn button & see if the fuse blows. Next, plug in the relay & do the same for the horn)

    Generally it won't be the wire from the horn button or the horn would be working continually. Your owners manual should tell you where the relay is & you could see if you notice any unusual appearance to the case, as well as following the wiring from there to the horn, to see if any damage is apparent. IE: if the horn is located in the front grill area or near a opening in the fenderwell, does it appear a rock or something has hit it or any wiring causing damage. With a vehicle as new as yours, if it isn't obvious damage, I would suspect the relay. good luck

    Jan 31, 2010 | 2007 Jeep Liberty Sport

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    2001 lincoln LS horn stopped working


    Principles of Operation
    When the horn switch is depressed, a message is sent from the instrument cluster via the network communication link to the front electronic module (FEM). The FEM acknowledges the message and energizes the horn relay by grounding the horn relay coil which allows the dual note horn to sound.
    Inspection and Verification
    NOTE: The FEM and instrument cluster must be reconfigured upon replacement. Refer to Section 418-01 .
    1. Verify the customer concern by operating the horn.
    1. Visually inspect for obvious signs of mechanical and electrical damage.
    ---------------------------------------------------------------------------
    Visual Inspection Chart

    MECHANICAL
  • Damaged horn
  • Damaged horn switch
  • Damaged horn relay
  • Damaged air bag sliding contact (14A664) C2

  • ELECTRICAL

    • Battery junction box (BJB) Fuses:
      • 425 (40A)
      • 422 (20A)
    • Central junction box (CJB) Fuses:
      • 202 (5A)
      • 213 (5A)
      • 217 (5A)
      • 220 (10A)
    • Auxiliary junction box (AJB) Fuse(s):
      • 104 (15A)
    • Damaged circuitry
    • Damaged horn relay
    • Loose or corroded connections
    • Damaged air bag sliding contact (14A664)
    Need a dealer for this part

    If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.

    Jul 06, 2009 | 2001 Lincoln LS

    1 Answer

    Horn not working


    no relay involved should find live wire behind head deck just get ur self a test light 12 bucks earth @ crimp end and needle point @ other with light up test the red or yellow cables with key off insure earth crimp is on chassis etc and push needle end on wires 1 should light up

    Jan 16, 2009 | 2007 Subaru Impreza WRX Sport Wagon

    2 Answers

    No brake lights or horn both on samefuse but fuses ok


    There may be a wire off the horn but this is no problem as they are only push on clips so if you locate the horn and check there are no wires off, if there is this should be your problem i would also advize just changing the fuse anyway making sure it is the right amp.

    Jul 25, 2008 | Suzuki Vitara Cars & Trucks

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