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kx250frider617

Engine ground?

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kx250frider617

I don't have my boat accessible at the moment, but does anyone know where the ground from the battery terminates on the engine? Alternator? Computer? 

 

I just replaced my in boat amp and I'm getting engine noise. I already have all my grounds terminating at one single point, ran new RCA etc etc. It has to be a bad ground at the engine. 

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kx250frider617

Forgot to mention. I have the indmar LS3

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jbower

Usually bellhousing. 

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MLA
2 minutes ago, kx250frider617 said:

. It has to be a bad ground at the engine. 

Nope, it doesnt have to be. If so, it might have been there prior to the amp swap, agree. Could be a bad new RCA for example. 

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jbower

Probably was pre existing. Could be remote wire, power wire to the head unit. Quiet a few options and usually never easy 

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kx250frider617

I'm pretty well-educated with audio system as I've used to be an installer.

 

The ground loop has been constant through multiple amp swaps, rca swaps. Running new power and ground wires for the headunit to the amps. I've re routed RCA's. the only factory stereo power wire is the 12v switched ignition wire for the headunit. 

 

I've tried every normal option to fix the issue except the engine power and ground side. I'm seriously lost on this one. 

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minnmarker
9 minutes ago, kx250frider617 said:

 the only factory stereo power wire is the 12v switched ignition wire for the headunit.

Not so hard to run a tap off your new power wire to this switch so everything originates and grounds at the stereo battery.

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mikeo

I had a nasty whine I thought was engine noise that I chased down to the amp remote/trigger on the black box in '15 LSV. I replaced the amp remote/trigger with a 12v relay (using the amp remote/trigger to operate the relay) with power directly from the 12v distribution block for the stereo and the noise went away. Do a quick test with a piece of wire from the positive side of the distribution block to the amp power on input (or just from the amp power lead) to see if the whine goes away. If it does, then you don't need to chase a "ghost" ground issue.

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isellacuras

I did a diy install with exile stuff last summer. I had a whine that I couldn't get rid of so I took it to a shop. They reduced the noise but were unable to eliminate it. After talking to the exile guys, I took it to a second shop of their choosing. Turns out it was a bad set of RCA's. I had a hard time believing it since my RCA's were brand new exile. Bottom line, noise is gone. Kinda funny that I spent as much money on tuning and fixing as I would have spent if I just would have paid a pro to do the install in the first place.  I used to enjoy doing my own installs, those days are now over. 

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