Question about 2002 Mercedes-Benz C-Class

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My 05 S430 has isse with all the buttons on steering wheel and horn do not work. Look at fuse chart, only mentioned Horn fuse (is ok) and relay... what could be the issue? or can be checked ? Thanks in Advance!

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  • Mercedes-Benz Master
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There is a contact set inside to make all those things work,and still be able to be able to turn the wheel.maybe broken inside or the harness under the column.be careful to disconnect the battery for 2 minutes or you may set off the airbag,as its plug is in the same area.the srs has to be disabled by battery disconnect

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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1 Answer

What number is the relay of th e horn 2008 ford explorer


Sorry but it is non - serviceable , location smart junction box ! If the relay were bad you would need to replace the smart junction box . Is the air bag light lit ! ( possible clock spring )
Inspection and Verification
  1. Verify the customer concern.
  1. Visually inspect the following for obvious signs of mechanical or electrical damage.
Visual Inspection Chart Mechanical Electrical
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  • Smart junction box (SJB) fuse 14 (20A)
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Symptom Chart Condition Possible Sources Action
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The horn relay primary receives + full time and is actuated by receiving ground (-) from the horn button. Check ground continuity at the horn button (at the steering wheel) to make sure it is working first (most likely culprit). If the horn button is working, check to see if the horn relay is working (second most likely culprit). To test the horn relay, provide chassis or battery ground to the (-) primary terminal of the horn relay and see if the horn honks. If it does, that will tell you that the problem is in the wiring between the steering wheel and the relay, most likely a disconnected wire at the steering column.
The only other components in the system are the fuse for the horn circuit (if you have 12v at the horn relay, that is fine), and the horn itself. My bet is on the horn button pad itself.

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I have a 2000 ford escort coupe and the horn stopped working. I checked the fuse and it is blown. Put in a new fuse, the horn just makes a low screeching noise constant. There is an alarm on the car, but...


Any thoughts on how to fix the horn? Test the electrical circuit , horn relay , switches !
VEHICLE RELAYS Operation Diagnosis
Visual Inspection Chart Mechanical Electrical
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  • Damaged steering wheel pad horn switch (part of driver side air bag module)
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  • Damaged speed control servo (if equipped)
  • Blown fuse:
    • 15A HORN
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Buick lesabre 1993 horn wiring diagram


is your horn relay good, swap another relay and see if that works, if not you should check wiring at lower steering column, you could splice wire from relay to wiring harnees at lower steering column inside vehicle

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Bought an 2004 honda accord and the horn does not work. What is the procedure for repairing this issue?


simple circuit, but can be hard if problem is switch in steering wheel. First check fuse and relay at fuse box. relay should click when horn button on wheel is pushed. If relay doesn't click, either button or relay is bad. If relay clicks, test for voltage at horn. You can use a simple test light available at the auto parts store if you don't have a voltmeter. If there is voltage at the horn, replace horn.
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1 Answer

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Where is the horn relay?


The dealer can hook up his diagnostic tool and retrieve the fault code. -------------- SECTION 413-06: Horn 2003 Expedition/Navigator Workshop Manual DESCRIPTION AND OPERATION Horn Horn components include the following items:
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  • horn relay
  • horns
  • steering wheel pad horn switch
Horn switches The horn switch is incorporated into the driver side air bag module in the steering wheel. The switch is powered through the clockspring and grounded through the steering column. For removal and installation of the horn switch, refer to Section 501-20B .
Horn relay The horn relay is incorperated into the central junction box (CJB). The central junction box is located behind the passenger lower kick panel.
------------------------------------------------------------
Symptom Chart
Symptom Chart Condition Possible Sources Action
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4 Answers

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If your Air Bag light light is aluminated and The Cruise Control does not Work then the Problem is in the "CLOCK SPRING" this Component is Located Under the Steering Wheel and it requires the Steering Wheel to Be Removed.You Must have Complete Instructions on this Procedure or Injury Can Be the result.

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2004 Camry horn is not working, horn, fuse & relay is ok. Got 12V "IN" Missing (-) from steering column harness to relay. Keyless entry will not turn horn either but will turn on lights and flashers with...


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