125000646 - N22 HORNS NOT WORKING/WORKING OUT OF TUNE

When the centre of the steering wheel cover is pressed, the horns do not work or they sound out of tune
Results of the tests
1HORNS CHECKAll OKProblems metOperation
Check the operation of the horns.Continue to Step 2Horns faulty.Repair the horns. Op.    Op. 5550B30 L/H OR R/H HORN (ONE) - R+R
Horns working out of tuneReplace the horns Op.    Op. 5550B30 L/H OR R/H HORN (ONE) - R+R
2HORNS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • Horns fuse
  • Horns relay
  • Horns earth
  • Continuity and insulation of electrical circuit between dashboard control unit and horns See    See E3010 HORNS
Continue to Step 3Defective componentReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections not correctRestore the connections See    See E3010 HORNS
3CLOCK SPRING/STEERING WHEEL ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • Connection between switches on steering wheel and clock spring.
  • Continuity and insulation of electrical circuit between clock spring and dashboard control unit
  • Operation of the switches
  • Operation of the clock spring See    See E3010 HORNS
Continue to Step 4Connections not correctRestore the connections See    See E3010 HORNS
Clock spring faultyReplace the clock spring Op.    Op. 5580C12 CLOCK SPRING FOR AIR BAG MODULE ON STEERING WHEEL R R
Switches faultyReplace faulty component
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.