Bumping again.  I have the same issue.  Low voltage at the maliview but 12.5 every where else.  It does not appear to be a charging or cable issue from the battery but something up with the display itself.  

So my gauges aren't working all the time, if I cycle my key about 40 times I can get the temp gauge to come back to 80, seems as though every time I shut off boat and re start it the gauge jumps 10 degrees till it maxes out,, I have pulled the cannon plug on both ends and put electric grease on them, I also checked my tether but it's been by passed, what can I check next

On Most older boats, the blower is turned on and off with its own dashboard switch. The bilge pump can be wired to come on with a dashboard switch (manual mode) and to come on when a float switch indicates the bilge is wet enough to be pumped. (Auto mode).  You may have a bad float switch or the switch may be turned upside down.   Look around in the bottom of the boat it would be near the bilge pump or it may be in the bottom of the bilge pump.

1 hour ago, Nick55 said:

Today I did the easy stuff first, isolated the power and ground for the amp, then I connected my iPad to the rca inputs to just test if I had a bad cable or output from the black box.  Still had the same noise along with the audio (using the amp adjustments to limit to below 120hz).   Then, I removed the sub from under the helm, and ran a short pair of wires to the amp to isolate speaker level outputs.  Unfortunately, it seems my speaker is bad, as I can tap on the back of the frame and basically duplicate the “static” sound I heard, so I’m going to call Wet Sounds on Monday.  I don’t expect any warranty support but I’d gladly pay for a repair or a replacement speaker.  It is definitely a Revo 10 FA S2 so maybe they can also recommend the correct speaker for that tiny pathetic little box I have (I don’t need big bass or comp level audio, but a little bump is ok to me).

There may something lost in translation but I read nothing that says the driver is bad and the amp is good. 

The "HP" version is the woofer designed for a small enclosure. However, the OEM "thing" Bu used is not a woofer enclosure and is too small and full of leaks to work with anything.