While replacing a bulb behind my centre console today I noticed that there was a wire coming off my boost gauge that wasn`t connected to anything. My gauge seemed to operate ok and lit up when the lights were turned on so I pushed it into the power for the analogue clock and it lit up the needle of the gauge red

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This got me thinking that I could maybe have the needle light up when the boost pressure goes past 1 Bar so that if the needle stays lit for longer than the usual 2-3 seconds of over-boost i`ll have a nice visual warning

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So does anybody know where I could get a suitable switch for this application?
Baz
