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Steering wheel controls
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Steve17
 


Member Since: 08 May 2016
Location: Essex
Posts: 422

England 2005 Discovery 3 TDV6 SE Manual Zambezi SilverDiscovery 3
Steering wheel controls

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
  
Post #213243828th Mar 2020 3:54 pm
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Nasher
 


Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2668

England 2016 Discovery 4 3.0 TDV6 HSE Lux Auto Loire BlueDiscovery 4

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.  
Post #213247928th Mar 2020 6:19 pm
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Steve17
 


Member Since: 08 May 2016
Location: Essex
Posts: 422

England 2005 Discovery 3 TDV6 SE Manual Zambezi SilverDiscovery 3

Could you pm me please
  
Post #213249128th Mar 2020 6:48 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

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
  
Post #213249528th Mar 2020 6:55 pm
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Steve17
 


Member Since: 08 May 2016
Location: Essex
Posts: 422

England 2005 Discovery 3 TDV6 SE Manual Zambezi SilverDiscovery 3

Would it be possible to use the phone button or the voice control button as a alternative
  
Post #213251728th Mar 2020 8:13 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yeah. Same applies as above though.

Voice button is a good idea
  
Post #213251828th Mar 2020 8:15 pm
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