I installed a Sony aftermarket stereo into my '99 saturn car recently. I usually just hook up the red, yellow, and ground wires first to make sure northing is wrong. When i do, the unit makes an ejecting noise, but the front display does not turn on. I checked fuses, wiring, everything is hooked up right. Could it be that a different size fuze is needed, or that a different wire, other than the yellow, red, and ground is needed for the display to turn on?
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