Sonar interference

[walleyejack]

I have a simple question,I have my sonar hooked up to my gps,which is in turn hardwired to my marine radio.Is like this in order to get the co-ordinates from the gps into the radio,if needed in an emergency.Problem is, when i trun on my Garmin gps,the sonar stops working,just flashes a 2ft depth when in reality we are in 78ft.I turn off the gps and the sonar comes to life again,any simple solution or ideas ?

[scugpg]

I have a simple question,I have my sonar hooked up to my gps,which is in turn hardwired to my marine radio.Is like this in order to get the co-ordinates from the gps into the radio,if needed in an emergency.Problem is, when i trun on my Garmin gps,the sonar stops working,just flashes a 2ft depth when in reality we are in 78ft.I turn off the gps and the sonar comes to life again,any simple solution or ideas ?

 

Gotta wire the sonar separate right to the battery w/o any switches for the best interference reduction.

[Terry]

if you have more then one battery on your boat

run one of them to the other battery

you can also put a ferrite core choke on the power line.....

[walleyejack]

Thank you guys.I was looking how it was wired again,I misdiagnosed,the marine radion and the gps are tied together and and hooked in to the circut breaker,the sonar / gps unit is hooked into a circut breaker,could it be possible,when i turn the Garmin on that it interferes with the sonar/gps unit ? It is the Eagle Fishelite 502c. I thought they were tied together,but they aren't. Maybe run wire from Eagle to the battery direct and see how that goes.