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shift light


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Have run out of room to Install a tacho on my 4wd without rebuilding dash (had attempted to run a digital tacho /speedo combination )but want to set up if possible a multiple stage shift light to give a basic indication of rpm.but the trick is I only have one output left.or am I dreaming?

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The ECU just switches a ground so if you have no tacho connected will need a pullup resistor.

In this case a 1K resistor between the signal and 12V will then give you a 0-12V square wave that the Omex will be happy with.

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