Shunt Wiring

[TPCowboys]

Recently upgraded 2 x 12 volts to 2 x 6 volt AGM bank.
Wired them in series (pic attached).
Appear to be charging well based on controller app readings (13.6 at Float).
Purchased a Victron 300 amp Smartshunt. Spent hours watching videos trying to find correct way - I was overthinking it.
Now I'm dumbfounded because I'm pretty sure it's wired right but I can't get the blue light to come on when I connect the thin red power wire.
Just for fun, I connected a jumper to the Battery Minus on the shunt to the minus post in 1 of my old 12 volts and the thin red power line from the shunt to the Positive post of the same old 12 volt battery - light came on so I know the shunt and the fuse is fine.
Any battery wiring gurus want to take a shot at this??? Original 6 volt series picture attached as well as the final shot including the shunt set up.

 

[JKJavelin]

Your picture is incomplete. The shunt should be inserted between the "house " circuit and the negative battery terminal. Instead of the negative cable going directly to the battery, it goes to the shunt, then to the battery. Can't tell from the pic.

JK

 

[TPCowboys]

Your picture is incomplete. The shunt should be inserted between the "house " circuit and the negative battery terminal. Instead of the negative cable going directly to the battery, it goes to the shunt, then to the battery. Can't tell from the pic.

JK

Sorry. Trying to make sense of your reply. The provided picture with the shunt attached essentially is in between the negative trailer system black cable (attached to shunt negative system) and the battery negative post.

Based on other replies, I'm pretty positive I have the batteries correctly wired in series (picture in original post).

To add the shunt, everything I have read and every video I can find talks a out making sure the shunt becomes part of the negative attachment. So this is where I removed the original negative cable to the battery and attached it to the system negative post on the shunt. I therefore completed the series with a jumper from the negative battery post to the shunt negative battery post. Hopefully that description helps and not further confuses. The original post has a picture of pre and post shunt wiring that I tried.

 

[AlDykstra]

The way it's connected, your Smarshunt is only getting six volts. In order for it to receive 12 volt power, the Smartshunt positive (red) power lead will need to be connected to the positive terminal of the second battery in the right side of your photo.

 

[TPCowboys]

Good point but I'm fairly positive I have tried touching the red power lead to that post as well but still did not get the blue power light to come on.

 

[TPCowboys]

Good point but I'm fairly positive I have tried touching the red power lead to that post as well but still did not get the blue power light to come on.

 

[AlDykstra]

I would try it again to be sure. Otherwise, you could have a bad battery. Like I said, the way it's connected in the second photo, it's only getting about 6 volts from a single battery.

 

[TPCowboys]

Are you aware if I would still be getting readings of 13.5 volts if 1 battery is bad. I don't think that would be the case. I appreciate you looking at this!

 

[AlDykstra]

With two batteries wired in Series, you would not read 13.5 volts if one battery is bad.