I need a switched power source that is not interrupted by ignition. Installing electronic boost gauge.


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The fancy step motor boost gauge that i bought needs an uninterrupted switched power source to function properly.  All the usual suspects are cut during ignition.  Does anyone know where I could find one?  Please let me know if you know.

 

 

Gary

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I believe the big red wire to the accessory connector is on all the time. You could run a new line from the battery and install a fused switch so it only comes on after you've started the car. Back in the day I used a sunroof switch as a momentary switch for an air horn. Same could work for an additional fog light switch in the bank behind the wheel. 

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The 850 has an accessory connector under the driver side dash; not sure if the S70 does? 

Look around under the driver's side dash until you find the Grn wire w/Ylw tracer.  Test it with test light or volt meter but it should be hot in RUN and START key positions. 

http://volvospeed.com/vs_forum/topic/173823-wideband-power-connecting/?do=findComment&comment=2427914

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