Garmin 93 sv plus interference problem, help please...

I am having a problem with interference on my bow mounted garmin. It has a great picture when I am not running the trolling motor but sometimes it becomes unusable when the trolling motor is on. It comes and goes. I can be trolling along and its all good and then for no apparent reason it goes south. I have moved cables, wriggled cables, flipped it the bird. Nothing helps. Does any body have any ideas? The trolling motor is a minn kota 80 lb thrust and its pretty old. Oh and the garmin is almost new.

Are they both hooked to the same battery



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Originally Posted by Lawnmowerman43

Are they both hooked to the same battery



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No, the Garmin is hooked to the cranking battery.

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My 73sv did the fuzz out every time I would hit the troller motor not sure what fixed it, after my step son wrecked my truck and the boat slammed into the tailgate it works fine, but I dont recommend that method. The Garmin folks are awesome when it comes to issues

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Lol, dont think I'll try that. I did run a twisted pair power cable today and moved my transducer wiring. I guess we will see.

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Is there a common on-board charger hooked to both batteries ...??

Rickie

what model? built in us2?

Yea there is a common charger and it's a Garmin 93sv plus unit. About 2 months old.

what model of trolling motor? does it have a us2 built it? have you checked the fuse in the top of the trolling motor? sounds like its a loose connection in that fused wire in the trolling motor head if it has one.

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Originally Posted by RoughriverRick

Yea there is a common charger and it's a Garmin 93sv plus unit. About 2 months old.

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Interference can back-feed from TM - thru the charger - then to the head unit ...

Remove the charger leads from cranking battery and test for interference ...

Rickie