Well what I’m doing is wrong. Please show me where I’m going wrong

 

first step hook up hds7 live to small battery

 

2. Hook up either net from HDs 7 to 3D structure module

 3. From the power section on the 3D structure scan module, I hook to another small battery

 

is the second battery to small for the 3D structure scan or why am I not getting an image. Thanks for you help. I want to use this thing so bad. Thanks for the knowledge and any help

The other thing that could be wrong. Is the power chord I’m using not right. It is not just a red and black chord. It has blue and yellow too. Am I able to just use the red and black part of the chord.

Maybe I need a chord with a fuse. I don’t know.

You have no instructions? The 3D module won't turn on without a signal from the yellow wire to do so. Go here and get some instructions. https://softwaredownloads.navico.com/Simrad/SimradYachting_Software - Copy/Downloads/documents/SS3D_IG_EN_988-10970-001.pdf

Is the only place you've tried this on the table?  Without a transducer in the water you won't get much...