Marine Electronics Questions? Ask a Technician for Answers ASAP
Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
If the ECU light is on your engine, then I would suspect that you need to check some 'industrial' voltages involved in both the engine and the pump motor, with a voltmeter.
The flashing ECU light, being both red and flashing, could be indicating a defect in the electrical system, in the way of a voltage being missing, shorted-out and loaded down below specs, or otherwise defective.
Sorry if I didn't comprehend all the details at first. Is your ECU light on the boat's engine/controls, or is it on the Garmin unit, or where?
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