Steve17
Member Since: 08 May 2016
Location: Essex
Posts: 422
  
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Afternoon can anyone tell me is there a way to take a live feed from the mode switch on the steering wheel. Bit of background I work as a on call medic and use my discovery for work it is fitted with lights and sirens and I want to be able to use the mode switch to change the siren tone but I need a 12v pos feed to do this. At the moment the air horn is activated by the horn button but I would like another button on the steering wheel to use to stop start and change siren tone from the steering wheel and the button I was thinking I use least is the mode one
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 28th Mar 2020 3:54 pm |
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Nasher
Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2815
 
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The buttons on the steering wheel work on a resistive network rather than simple on/off principle.
Any additional load anywhere may upset the signal to the head unit etc.
Nasher Heaven doesn't want me, and hell is afraid I'll take over.
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| 28th Mar 2020 6:19 pm |
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Steve17
Member Since: 08 May 2016
Location: Essex
Posts: 422
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Could you pm me please
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| 28th Mar 2020 6:48 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10684
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You could remove the button illumination facility.
Use that red? Wire
Disconnect mode switch
Connect it to the red wire to mode switch
Connect other mode switch to ground
Use a relay in the car to swap ground to positive
It’s a lot of fuss, which s likely to result in breaking something
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| 28th Mar 2020 6:55 pm |
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Steve17
Member Since: 08 May 2016
Location: Essex
Posts: 422
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Would it be possible to use the phone button or the voice control button as a alternative
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| 28th Mar 2020 8:13 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10684
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Yeah. Same applies as above though.
Voice button is a good idea
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| 28th Mar 2020 8:15 pm |
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