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trolling motor interfering with sonar?

I put a ferrite bead on both transducer cables with no real effect. I saw this on Garmin site so I’ll add to NMEA cables and power cables. Not holding my breath.
Disconnecting ground from nav lights did not help
The extra cable from the transducer leads is in 1’ loops neatly zip tied and laying on top of the reverse actuator boxes in head compartment. Uncoiling them just to see would be major PITA but right now I can think of nothing else.
I have noticed it is interfering with clear-vu as well. Standard sonar thru factory Airmar is the only thing that is really clear with troller on. Very disappointing
IMG_4696.jpeg
 
Well shoot. I was sure that would clear things up. Like i said before I had MK powerdrive and 2 garmins with live scope all on the same 12v supply and had no interference. Not sure why Garmin shows ferrite beads on power and network cables also. That’s a new on to me
 
Update...

The re-located ferrite bead seems to have done little to nothing to reduce the interference on the sonar.

Below are 2 screen shots from the weekend. I see now that the TM interference seems to affect the traditional sonar and the side view. My solution is to use the clear view which seems to be OK.


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1759172814051.png
 
I’m with ya. I have 2 things left form the list I got from MinnKota. Add 1more ferrite bead inside the base of the troller. And bond the ground from 2 trollers batteries to the ground of the house battery.
 
So I have a correction. Ferrite beads all over the place have actually helped. The interference now disappears at high trolling motor speeds. About 5 or 5-1/2 the interference goes away. So if I’m headed into the wind and keep speed at 3 mph with higher troller speed I get clear down and side view (!). It all BTSOOM for sure.
 
I put them on every wire attached to both Garmin units as close to unit as possible. The 12inch unit has 2 transducers, Network Cat 5 looking cable, NMEA and power cable. The 9 inch has Network, NMEA and power. I bought this assortment from Amazon. Except for power I looped the wires.
IMG_4705.png
 
I’m glad that made a difference. I can’t believe it took them on every connection but they are pretty cheap and since it worked, it’s a win!
 
Well I’m not done yet. I think it should work regardless of troller speed. As noted above a couple things yet to try. But yes, progress!
 
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