Hummingbird puck issue

When I turn on my Ultrex my gps puck light turns off. Both are brand new. New fuses as well. I'm confused

The light does not stay on all the time. Just the first 3 seconds after getting power.

Did you read the manual?

I did while checking everything. When I was testing the bird the puck light was on the entire time but switched off when I flipped the Ultrex on. I must have over looked something.