Sorry - thing = receiver. I can't get either receiver to power on.
Both receivers are brand new.


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1) Do they need to be grounded in order to power up, and are they?
Check the installation instructions.

1a) Are you connecting the wires to the proper terminals?

2) Odds of having a bad wire or poor connection to the battery are
higher than having *two* brand new receivers that won't work. Test for
voltage at the end of your test wires. If you don't have a meter, wire
something else that is known to be working to the end of the same two
wires and see what happens.