Sounds like the inlet isn't working.
I know you stated it's a new pump but it still could be faulty.
It's not a complex system.
inlet / pump/outlet,
But a thought occurs,
maybe somehow the polarity is reversed,
try swapping the wires around.
or hooking it up to a battery with jumper wires,
at least then you can figure which wire is meant to be bat +,bat -.
Posted on Monday 14th of August 2017Don't understand this? Ask a question