WR450F Horn Problem


4 replies to this topic
  • Downunder_wr450

Posted August 18, 2016 - 11:42 PM

#1

Hi All,

I have a 2009 WR450F however the Horn is not working. I have replaced the amplifier and still no luck. Have tested the button and it appears to work ( test with multi-meter continuity)..   

 

Question:

  • Is the horn AC or DC?
  • what voltage should be going to the horn?
  • Should the horn be earthed??
  • What does the amplifier do??

 

Any help you can give will be greatly appreciate as this is doing my head in.... it a simple horn.. .apparently NOT.

Cheers


Edited by Downunder_wr450, August 19, 2016 - 01:36 AM.


  • Krannie McKranface

Posted August 19, 2016 - 05:21 AM

#2

Amplifier ???

 

Do you mean Rectifier?

 

The horn is DC, + & - direct to the battery (via the harness and it's fuses), with a button interupting the connection.

 

MC horns are pretty fragile.

We don't get OEM horns over here: is it mechanical (round with a nut on the front and or rear) or is it electronic ( a square box with no adjustments) ?

 

If it is mechanical, usually the adjuster needs to be adjusted periodically to keep the horn working.

Dirt and water will render it dead, until you clean it and re-adjust it.



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  • Downunder_wr450

Posted August 20, 2016 - 09:35 PM

#3

Its a Mechanical one.  Yes it is DC, however the button delivers 0.8 volts to the input of the amplifier and then 6 volts output towards the horn.



  • Krannie McKranface

Posted August 21, 2016 - 04:52 AM

#4

Its a Mechanical one.  Yes it is DC, however the button delivers 0.8 volts to the input of the amplifier and then 6 volts output towards the horn.

 

Sounds like a relay, and you have a 12v system, so maybe you are looking at the meter wrong ??



  • Downunder_wr450

Posted August 26, 2016 - 03:09 AM

#5

Finally got the Horn working.... End Result was a faulty Horn.

However just for those out there who will one day be troubleshooting a Horn. For and Australian ADR compliant WR450F the voltage from the button towards the input of the ampilifer is 0.8volts. Output from the Amplifier is 6 volts DC which connects to a 6v horn. Also note that the horn must be isolated from the frame i.e. NOT Earthed.

 

Good Luck out there... :)






 
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