Electrical accessories issue/ voltage drop

[Bigmoose88]

Alright so just redid my electrical a lot of it was just replacing existing I did add a second fues panel everything Worked great for while , then all of a sudden both my fuse banks were getting 5 to 7 volts and my gauge was reading the same bounces from 5 to 7 . Now my engine , trim all
Operate fine alternator working , I’m getting 14 volts everywhere except my fues panels , both the main fuses for the 2 fuse panels show 14 volts on both ends I changed my dual battery switch so I’m not sure what’s going on , any help is greatly appreciated

 

[Scott Danforth]

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a ground.

 

[Bigmoose88]

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a al

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a grou

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a ground.

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a ground.

I’ve been working on it what’s weird is I just changed all of them , and it worked great didn’t even take it out yet b4 this happened maybe a failed connection, it would have to be a main ground somewhere right ? Is there any way I can verify this run another ground to see if that fixes it

 

[Bigmoose88]

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a ground.

start at the battery and work your way up to the helm cleaning every connection (both power and ground) along with every harness connection. you have a bad connection somewhere. probably a ground.

Alright so just redid my electrical a lot of it was just replacing existing I did add a second fues panel everything Worked great for while , then all of a sudden both my fuse banks were getting 5 to 7 volts and my gauge was reading the same bounces from 5 to 7 . Now my engine , trim all
Operate fine alternator working , I’m getting 14 volts everywhere except my fues panels , both the main fuses for the 2 fuse panels show 14 volts on both ends I changed my dual battery switch so I’m not sure what’s going on , any help is greatly appreciated

Alright update I removed all the fuses from fuse blocks and the voltage is now at 11.7 and 11.8 and holding steady but. Both battery’s shows 12.3

 

[Scott Danforth]

you have not cleaned anything

go back and check all the connections. start at the battery. use 320 grit sand paper and shine up every connection until it is clean enough that your mother in law can eat off them. battery terminals, cable connections, starter, block, circuit breaker connections, etc. all of them need to be cleaned from the battery to the motor then up to the helm.

once you are done and each connection is clean and tight. you then seal them with marine electrical varnish.

without a load, you are not seeing the big voltage drop. the only load you have is the meter which is less than 2 milliamps. however with a good connection you would not see any voltage drop, and only the voltage drop due to internal resistance of the wire with a load.