How to get power only when ignition is on?
I want to install two battery gauges in my dashboard, one for the engine battery and one for the house batteries. The charge/discharge gauge in the instrument cluster no longer works. I could just...
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For the Ignition on lead you can pick up power from the dash radio lead
Yeah! That should do it!
As it turns out, these battery gauges have a 3rd contact built in that when de-energized turns off the gauge. So I did not even need the relay. I just need to find an ignition-hot and send it to the "C" contact on the gauges. Then the + and - from the gauges go through a fused lead to the respective batteries.
Steve
