Re: Problem no power to gauge
The HFS-3 has its own switched power supply within the unit.
The system will only power-up when the grey harness sees a +12V supply, Normally wired to a terminal that mirrors the fuel injector positive (non-direct injected type).
I didn't quite understand the answer, is the system powering up now?
What car is it?
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Richard L
aquamist technical support
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