Jump to content

Bad Grounds question


lineman49

Recommended Posts

  Just installed a new Lowrance Elite 7 HDI  fishfinder/chart/gps. On the sonar I get alot of vertical "static lines" on the screen & was told it might be bad grounds in the boat.The faster I go the worst it gets.  It is worst when I am using the trolling motor than with the main motor .  My question is where does one start looking for bad grds. & where is the main grd found on a boat?  Any good ideas?   Thanks!

Link to comment
Share on other sites

Just installed a new Lowrance Elite 7 HDI  fishfinder/chart/gps. On the sonar I get alot of vertical "static lines" on the screen & was told it might be bad grounds in the boat.The faster I go the worst it gets.  It is worst when I am using the trolling motor than with the main motor .  My question is where does one start looking for bad grds. & where is the main grd found on a boat?  Any good ideas?   Thanks!

.

Is your boat I/O or outboard, all main grounds come from neg. side of battery to engine block,check the neg cable for corrosion and the terminals for the same and the the connections for tightness,are you. Using the same battery for troller and starting? Where are you getting the ground and power from, the fuse panel, or did you run new leads from a different power source?

Link to comment
Share on other sites

The only "true" ground on a boat is the neg. side of the battery as the block of the motor is isolated from the hull of the boat by mounts. The 12 volt system only functions off the return to ground.The most simple fix is running a 2 conductor straight to the battery.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...