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<blockquote data-quote="southbark33" data-source="post: 4380317" data-attributes="member: 590377">are you referring to the Pioneer HU&#039;s?The Pioneer HU&#039;s have an external fuse, it&#039;s easily visible, birght red 10amp fuse that prevents too much power from passing thru the headunit, a safety feature. However, the fuse that I and most other people are talking about is the pico-fuse inside of the HU on the backside of the circuitboard. This fuse is what grounds the RCA preouts internally. If that internal pico fuse blows, you recieve overpowering engine whine, which is what I&#039;m getting right now. I was searching through another forum with the same topic and they said that they fixed it removing the blown pico fuse and replacing it with a 1ohm 1/4 watt resistor, which is what most HU&#039;s have instead of a fuse.I tried that method and it didn&#039;t work for me. I tested the connection between the pico fuse prior to taking it off and it wasn&#039;t giving me a reading.Yes I def changed the correct one, I was referencing the schematics and the fuse was about the size of an eyelash with a little letter &quot;p&quot; on it, with the tag &quot;FU-352&quot; next to it.</blockquote>

[QUOTE="southbark33, post: 4380317, member: 590377"] are you referring to the Pioneer HU's? The Pioneer HU's have an external fuse, it's easily visible, birght red 10amp fuse that prevents too much power from passing thru the headunit, a safety feature. However, the fuse that I and most other people are talking about is the pico-fuse inside of the HU on the backside of the circuitboard. This fuse is what grounds the RCA preouts internally. If that internal pico fuse blows, you recieve overpowering engine whine, which is what I'm getting right now. I was searching through another forum with the same topic and they said that they fixed it removing the blown pico fuse and replacing it with a 1ohm 1/4 watt resistor, which is what most HU's have instead of a fuse. I tried that method and it didn't work for me. I tested the connection between the pico fuse prior to taking it off and it wasn't giving me a reading. Yes I def changed the correct one, I was referencing the schematics and the fuse was about the size of an eyelash with a little letter "p" on it, with the tag "FU-352" next to it. [/QUOTE]

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