Fish Finder Electrical problem

[Red Shad]

I run two fish finder units on my boat. a Humminbird 595 in front and a 597 at the console. My problem is with the front unit, after being on the water for awhile the unit will start showing low voltage input and keep dropping until the unit turns off. The unit at the console has no drop in voltage and continues to work. If both units are working off the same battery why is this happening? Any advice of correcting this problem would be appreciated. Thanks

[Brandon__]

I run two fish finder units on my boat. a Humminbird 595 in front and a 597 at the console. My problem is with the front unit, after being on the water for awhile the unit will start showing low voltage input and keep dropping until the unit turns off. The unit at the console has no drop in voltage and continues to work. If both units are working off the same battery why is this happening? Any advice of correcting this problem would be appreciated. Thanks

shot in the dark but are your connections on a fuse panel or just connected to the battery with a in-line fuse?

[LJP]

The front unit more than likely has a bad connection.

[bplgocards]

The front unit more than likely has a bad connection.

I agree, sounds like a bad connection to me. I'd check the wiring.

[DJD]

If the front unit has a small gauge power pair it could be getting hot and that robs power which would eventually caause that problem. If that was the problem pulling a larger gauge wire would fix it. Just wondering if it comes back on after an hour or so while it cools down?
Of course a bad connection gets hot as well. Prolly not to hard to isolate with a meter and some troubleshooting.