Battery warning as shift light

[giorgioS2]

Hello, I've seen a couple of videos where they've manage to use the battery warning from the dash board as a shift light, how can I do this ???

Ex:

http://www.youtube.com/watch?v=hdgduUL2Ebc

Cheers,
Giorgio.

[maddagent]

its not the battery light its the roof opening / closing light as used on the cabriolet.

I'd imagine its just an empty bulb holder on an S2. looks like they've stuck the shift light bulb into it.

[prj]

It's very easy.
The signal to the speedo is analog.
Just tap that signal and once the voltage is over a certain amount activate the light...
Can even use a simple potentiometer to make it adjustable.

[goodall]

It's very easy.
The signal to the speedo is analog.
Just tap that signal and once the voltage is over a certain amount activate the light...
Can even use a simple potentiometer to make it adjustable.

But not the speedo that turn son shift light its the tacho, which is normally digital with the frequency relating to the rpm

[andyg plym]

i have shift lights on my s2 super touring audi style. i tapped it into the blue and green wire on the rear of the rev counter

[prj]

But not the speedo that turn son shift light its the tacho, which is normally digital with the frequency relating to the rpm

Yeah sorry, I meant tacho (actually instrument cluster...).
If it's digital just use a DAC, they are cheap...

Either way, this is extremely easy to do.