Minn kota 4 bank multiple red lights

[flipnstick91]

I have a 4 bank minn kota onboard, and it is showing 3 red lights(meaning 3 batteries are below 8v). Replaced all 30amp fuses on the leads. I have disconnected the leads to one of those batteries and hooked to a battery i know is good and the red light goes away. However, i tested all 3 "red light" batteries and only 1 is bad. Why would the charger show a red light for a battery that tests 12V? I should add that my mechanic allowed my batteries to die completely without charging them at his shop but now they will accept/hold a charge, just not from my minn kota. Could the bad battery have shorted out other banks in the charger? Red light batteries are cranking and 2 out of 3 TM batteries. Thanks in advance.

[catch5nRide]

I would try charging each battery with a manual charger then try your minn Kota charger and see if it picks them up

[jimsch]

Are these lead acid or AGM? My 440 PC started doing that on AGM's but was fine on regular batteries.

[flipnstick91]

Are these lead acid or AGM? My 440 PC started doing that on AGM's but was fine on regular batteries.

Actually both, cranking is agm others lead acid. But i done got her figured tonight! Charger was stuck on reading they were all dead, simply hooked the charger leads to a good battery then back to the "dead" batteries and it somehow resets the charger and now it will charge those batteries it was saying were dead. The battery i tried that on the first time was actually dead so it didnt work but decided to try it on the rest since they tested for 12v and like magic i only need one battery instead of 3 lol thanks for replying guys!

[LTZ25]

Good news .

[billnorman1]

Pretty old trick, hooking up a good battery. Most leave the charger hooked to the low battery, then use jumper cables to fool the charger into starting.