Flytrade
Active Member
My recently purchase 06 Sundancer 320 had 4 great batteries. However, they were each 4.5 years old, so I thought I would be smart and replace all 4 batteries so I won't have any problems. The way the electrical system is set up is each of the two batteries is connected in parallel, so I wind up with two very strong batteries on each system.That worked great until just today a bank of two batteries are completely dead.
I can start the left engine normally, but the right engine ignition is completely dead. So, to start the right engine I have to use the switch that connects all the batteries. That works fine, but now I also have problem with the right outdrive trim, etc.
My original thought was I got a bad battery, and it wad draining down the other good battery that was connected in parallel. It was easy to find the two batteries that are used for the right engine, so I disconnected them, and reconnected the battery terminals to one battery at a time. No luck - the engine will not turn over. And, each battery, not under load, checks out with 12.9 volts.
Now, do I have a pair of bad brand new batteries, that go bad under load, or is the problem in the electrical wiring. I used a jumper cable to connect a known good battery - one that will state the left engine - to the electrical wiring of the right engine, and it also will not start the engine. Everything on that side is completely dead.
So now I know the problem is not with the batteries, but somewhere in the battery cables, or more likely, what they are connected to. Is there a circuit breaker, switch or something else that has been tripped? Any ideas would be appreciated.
I can start the left engine normally, but the right engine ignition is completely dead. So, to start the right engine I have to use the switch that connects all the batteries. That works fine, but now I also have problem with the right outdrive trim, etc.
My original thought was I got a bad battery, and it wad draining down the other good battery that was connected in parallel. It was easy to find the two batteries that are used for the right engine, so I disconnected them, and reconnected the battery terminals to one battery at a time. No luck - the engine will not turn over. And, each battery, not under load, checks out with 12.9 volts.
Now, do I have a pair of bad brand new batteries, that go bad under load, or is the problem in the electrical wiring. I used a jumper cable to connect a known good battery - one that will state the left engine - to the electrical wiring of the right engine, and it also will not start the engine. Everything on that side is completely dead.
So now I know the problem is not with the batteries, but somewhere in the battery cables, or more likely, what they are connected to. Is there a circuit breaker, switch or something else that has been tripped? Any ideas would be appreciated.