now i want to say a massive thank you to everybody that wrote in when i did my battery install video
to point out that i'd wired up my shunt wrong i've never connected a shunt before so i didn't really
know what i was doing and i just went by the diagram on the box and if anything for you guys
writing in and telling me that i've done it wrong it would have been none the wiser
so yeah a real big thank you and that's the one thing i like about this whole youtube channel
community is that people do tend to stick together and help each other out and i really do appreciate
all of your help so let's get into this and i'll explain exactly where i went wrong
so my biggest mistake was going by the diagram on the back of the box this is the box that the
shunt came in and the shunt basically registers the voltage going in and out of the battery
and according to this diagram it's really simple you connect the shunt to the negative
of the battery and then the other negative wire goes to the system ground and i took that as being
the chassis of the vehicle i thought that's really simple so that's exactly what i did i connected my
shunt from a negative cable as you can see there this negative wire goes to the top of the shunt
and from the bottom of shunt it it goes down to ground the mistake i made was to run a separate
negative wire coming from the same terminal from the battery and that is where i went wrong this
negative wire going to my fuse holder should have gone to the other side of the shunt and the reason
for that is because now the shunt won't measure the current coming out of the batteries the other
mistake i made was my c-tec charge controller the negative wire from that i've connected
straight to the battery as well when that wire should have been the other side of the shunt
so let's break this down in a simple terms because that does sound rather complicated basically
you connect this wire to the negative of your battery your leisure battery and then everything
else everything goes on the other side of the shunt no more negatives need to come from the
battery all your negatives have to go the other side of the shunt it really is as simple as that
it was a simple scoreboard error so now all i've got to do is put it right because i've
got to move this as well this is another thing because i've got a change how this is wired my
positive cable has got to come from this terminal of this battery to this terminal on this battery
and i'll explain why once i've done it all well i ended up running out of daylight so i had to
finish this off in the dark so this is now the next day so i'll quickly run through exactly what
i've done to correct my rather terrible mistake let's have a look and i'll show you exactly what
i've done so let's take a real close-up look at what i've actually done here the most obvious
thing is the fuse box i've flipped it over so my negative is next to the shunt and the positive is
more in line with the positive of the battery just makes it that little bit neater now talking about
the positive side you'll also notice i've put an isolator switch this switch isolates all the power
going to the fuse board from my battery now while we're talking about the positive side also
i just want to point out that all our positives go to this terminal here and is simply bridge to our
second battery across here but all our negative goes from this battery that gives us a nice cross
flow of current across both batteries it ensures that batteries are charged together and they're
also drawn together it creates that nice cross charge or cross connection so all our positives
come from this battery all our negative comes from this battery but here's the thing is there's the
difference the negative side of things is where the shunt comes into play and this is where i
went wrong and i should have connected my shunt directly to my negative terminal and my battery
and that is it nothing else don't connect anything else to your negative side of the battery just
your shunt and then this side of the shunt this becomes your negative terminal so this part here
this replaces your battery basically so all your negatives must come to this side of the shunt
that includes charge controller fuse box and the negative ground to the van as simple as that and
that's where i made my mistake i connected my c-tech to my battery and i shouldn't have done
i should have connected it to the negative side of the shunt well i hope all that made sense but
if it didn't don't worry i've created a wiring diagram which i shall play at the end of this
video and i'll leave it up there for about 10 seconds so you've got plenty of time to freeze
frame and to have a good look at that diagram okay then well thanks for watching it's hot for now
you