2012 Speedster 150 Battery Cutoff Switch

[WaTeRMaNiaC407]

This is for the experts out there. I am adding a second battery to my 2102 Speedster 150. When I look at the existing cutoff switch, there are two wires going to each side of the switch. On one side of the switch there are two wires. One is labeled SW and the other one is labeled SR. On the other side of the switch there are also two wires. One is labeled BAT and the other is labeled HC. I know that the side labeled BAT is the wire that runs directly to the battery. I need clarification on what the HC wire is. It is obviously connected directly to the battery because they are on the same side of the switch. When I hook up the new switch with Battery 1 and Battery 2, should I just leave the HC wire connected to Battery 1 as it is now? I looked at the service manual and it seems that the only thing that should be hot all the time is the bilge pump, but I do not think that the SR wire is the wire that runs back to the pump.

Any ideas on what the SR wire is for?

I appreciate any inputs here.

 

[RFoster130]

This is for the experts out there. I am adding a second battery to my 2102 Speedster 150. When I look at the existing cutoff switch, there are two wires going to each side of the switch. On one side of the switch there are two wires. One is labeled SW and the other one is labeled SR. On the other side of the switch there are also two wires. One is labeled BAT and the other is labeled HC. I know that the side labeled BAT is the wire that runs directly to the battery. I need clarification on what the HC wire is. It is obviously connected directly to the battery because they are on the same side of the switch. When I hook up the new switch with Battery 1 and Battery 2, should I just leave the HC wire connected to Battery 1 as it is now? I looked at the service manual and it seems that the only thing that should be hot all the time is the bilge pump, but I do not think that the SR wire is the wire that runs back to the pump.

Any ideas on what the SR wire is for?

I appreciate any inputs here.

Im not sure what the HC wire is...but frankly it makes no difference. You hook it up exactly the same way. Stuff that was on the hot unswitched side of the battery still needs to be on the hot unswitched side of the battery. Everything else you want powered by the switch all goes to the same common post.

 

[WaTeRMaNiaC407]

Im not sure what the HC wire is...but frankly it makes no difference. You hook it up exactly the same way. Stuff that was on the hot unswitched side of the battery still needs to be on the hot unswitched side of the battery. Everything else you want powered by the switch all goes to the same common post.

I guess that is true, but I still would like to know what is tied to the one battery if I am running off of the other. It may just be the bilge but it is very difficult to trace with all the wire loom running everywhere.

 

[WaTeRMaNiaC407]

Im not sure what the HC wire is...but frankly it makes no difference. You hook it up exactly the same way. Stuff that was on the hot unswitched side of the battery still needs to be on the hot unswitched side of the battery. Everything else you want powered by the switch all goes to the same common post.

I ran the boat yesterday for the first time since I installed the second battery. I have a volt meter installed to monitor the house voltage. Here are the results.

Switch on Battery 1 = Voltage about 13.8 volts while running with a high of 14 with heavy throttle
Switch on Battery 1 and 2 (combined) = Voltage about 13.4 volts with a high around 13.7 with throttle
Switch on Battery 2 = Voltage about 12.5 volts but no increase with throttle and in fact a slow decrease over a 15 min ride down to 12.2 volts.

Is it possible that the HC wire is for the charging system and since I left it connected directly to battery 1, that is the only one that is charging unless I do a combine with the iso switch?

I am pretty sure that battery 2 is NOT charging while I am running it alone based on the above voltages.

 

[RFoster130]

Thats a good possibillity if you just connected it back to battery 1. It should have gone to the common post, so it is doing whatever it needs to do regardless of where the switch is. It could be the charging wire. I would disconnect it. Start the boat and see what that wire is showing while disconnected. If it shows voltage, you know that is what it is. If that is the case, move it to the commone post. Thats what i would do with it anyway.

 

[WaTeRMaNiaC407]

Thats a good possibillity if you just connected it back to battery 1. It should have gone to the common post, so it is doing whatever it needs to do regardless of where the switch is. It could be the charging wire. I would disconnect it. Start the boat and see what that wire is showing while disconnected. If it shows voltage, you know that is what it is. If that is the case, move it to the commone post. Thats what i would do with it anyway.

Thanks, It makes sense. I am going to verify the voltage and move it. I definately want to be able to charge battery 1 when it is isolated. Right now I think that I when I am running with battery 1 isolated I am charging battery 2.