Terminal 30 is constant 12v, "open or short to ground" means that the module isn't getting 12v, so most likely will be the fuse. From a distant memory, it is a 30a or even 40a, so I suspect the compressor is faulty which caused the fuse to pop. If you could hear it before, that makes me even more suspicious of the pump!!!!
As ainarssems says, the other modules showing "supply voltage low" will be a low battery, but that won't be the cause of the suspension issue, which if the date is correct won't have worked since June?
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