[VanGuy]

In order for a house/aux battery to be connected to the van's starter battery (via an isolating solenoid), is there a specific terminal or bolt or battery post to mount to?

I see folks using the terms "connected to the alternator" and "connected to the starter battery" but I didn't know if these were different physical locations or if there was an real-world difference in performance.

 

[SteveSS]

There is a fuse block sitting on top of your starter battery with on open slot for another mega-fuse. That's your connection point for the isolator. There are several posts with photos, etc. For example post #23 & #24 here:
http://www.promasterforum.com/forum/showthread.php?t=58866&highlight=mega+fuse&page=3

 

[dttocs]

See also http://www.promasterforum.com/forum/showpost.php?p=303362&postcount=2 although if you have a 2017 or newer you may not have an open slot.

 

[SteveSS]

Our late-2017 came with an open mega-fuse slot. It looks just like the photos of earlier fuse blocks. Does your 2017 not have one?

 

[keeponvaning]

Just to clarify - it’s not connected to the alternator (unless you perhaps have an auxiliary alternator) it’s connected to the positive side of the starting battery. Sometimes we tend to be not as precise with our terms as we should be

 

[dttocs]

Our late-2017 came with an open mega-fuse slot. It looks just like the photos of earlier fuse blocks. Does your 2017 not have one?

I'm betting you have neither aux switches nor aux battery prep. I have no open slots - see the thread I linked above.

 

[SteveSS]

Ah, that explains it. I have neither of those.

 

[VanGuy]

Just to clarify - it’s not connected to the alternator (unless you perhaps have an auxiliary alternator) it’s connected to the positive side of the starting battery. Sometimes we tend to be not as precise with our terms as we should be

Thanks! exactly what I was wondering.

 

[RDinNHandAZ]

The positive terminal of the starting battery is then connected to the alternator so electrically the connection is also to the alternator so KOV is right but the difference is trivially different. It does help that the battery is in a much better position to make the connection that is why we all connect there.