• 76 Answers SOURCE: Sorry for the delay. I don't understand why they have the third 'on/off' switch.

Normally on a boat like yours, the set would be as follows: Each pair of batteries would be jumped together to make a single large bank. We can then consider them 'bank 1' and 'bank 2' usually they will correspond to port and starboard. Now you will take the positive lead from bank 1 and connect it to B1 on the port switch and then jumper it to B1 on the starboard switch. You will do the same for bank 2 and the starboard switch. The 'common' on each switch will be your positive output to the motors corresponding them to port and starboard. Now you can run your port motor with the port switch selected to battery 1 and the starboard motor with the starboard switch selected to battery 2. Your emergency parallel is already built in.

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If battery bank 1 dies, you can start both engines with battery bank 2 and vice versa. Putting the switche(s) to the 'all' position will allow you to start/run the engine(s) form both banks at once.

You can use the third switch to supply the 'house' system. Take its power feed from the 'common' terminal on either of the battery switches. In this way you can isolate which battery bank you use to draw power from for all of your accessories so there is no fear of you running a battery bank dead and being stranded. For example if your house feed is connected to the port battery switch and you have the port battery switch selected to bank 1 (port bank), should you run the battery dead listening to the radio you can simply start the starboard engine and then select 'all' on the port switch.

Now the starboard engine will be charging the port battery bank, bringing the house system back to life and allowing you to start the port engine. In order for the system to work it is important that all of the battery and engine grounds be connected together in a central point (a common buss bar). Max Payne 2 Mobile Download more. Dont forget that you cannot switch battery switches while the engines are running. Posted on Aug 22, 2009. First of all do you have 3 or 4 batteries your cranking battery is not to be wired into this 36 volt if you have 4 batteries you have 3 for trolling motor and 1 cranking battery look on your charger see if the banks or numbered 1 2 3 4. You got to find what battery is # 1 depends on how they hooked in series if you hook charger on wrong battery most the time a red light comes on telling you wrong battery move wires till green lights come on all batteries.# 4 goes to cranking battery if you only have 3 batteries you don't have 36 volts you have 24 volts and a cranking battery if so # 3 goes to cranking battery Aug 29, 2013 .