Minnkota mk210 issue

I’m assuming I have a bad bank on my charger just wondering if anyone else has had this issue and can confirm. I havent recieved a reply from them as of yet and I’m impatient. I charged my batteries prior to putting them in the boat and hooking them up to the on board. I have a constant red(check connection) and green(charged) on bank 1 regardless of which battery I have it hooked to. I cleaned all connections with a brush and baking soda water. Fuse seems fine however I did not swap fuses as of yet that’s next on my agenda as well as possibly putting a new connector on to see if maybe the wire in the crimp is corroded. Any other ideas that I have not come up with?

You could switch batteries, see if the other back turns green. I once had a battery so dead my onboard charger wouldn’t recognize it

Checking your fuse is the next step.

After that……it’s prolly toast….

I have tried swapping batteries..bank 1 is the one giving issues I hooked it to the cranking battery and the trolling battery and both lights stay on

MK 210 (D or PC?)

It would be the D..its an older one I don’t even believe it has the D on it but I know it’s not a PC

I have seen the wires from the charger corrode internally. You don’t notice it until you check the wires closely. Not saying this is your problem but I would check them. Sometime the wire is broke internally and some times the resistance restricts current flow. If you have an ohm meter you can remove the wire from the charger and ohm it to make sure there is no resistance from the wire.