I have 2 1198's on my boat, one at the console, one up front. Also, two HDSI transducers. One on the transom, one on the Terrova. Everything is networked.
Dropped my Terrova into the water and started receiving horrible noise when I was running the trolling motor. Turn the motor off, noise goes away. Didn't take long to figure out what was wrong. As seen in the pic, the shielding for the wire was completely severed. Realize, I exaggerated the damage to make it wore obvious in the pic. I was really actually lucky I caught it before the wires shorted out and took out my entire network.
I came to realize that after 4 years of stowing the trolling motor was the cause. Although in the picture it looks as though there is a space there, when I stow it was actually contacting the wire.
I thought about trying to install a repair, but because of where it is along the run it would be difficult to ensure that it was water tight. It is right at an area where the wire was almost at a 90 degree bend. So I ordered a new transducer. LLL also turned me onto a new product that I ordered, as seen here:
https://www.cornfieldcrappiegear.com/product-page/cable-save-r-for-ulltrex-motorThe good thing about their product, is you don't have to worry about installing the wire up the shaft sleeve, and gluing it. Also, the head does not need to come off the trolling motor to route it. Just thought I would share before it happens to someone else.