MK345D charger.

[Mike S.]

My charger mysteriously doesn't work this year. I pulled all of my batteries and the sub floor out of my boat the other day to replace my aerators. I also needed to refill the water in my batteries. When I put everything back together, my charger's indicator lights are all red, which shows that the connections are bad. I pulled all of the batteries back out. I cleaned the terminals, I cleaned all of the wire leads, and I checked all of the fuses. Still no change. This charger is only 3 years old. Is there something I'm missing?  If I don't have it figured out by Monday, I'm ordering a new one, and the old one will fall victim to a bat or something. That's how grown up I am. 

[Manxfishing]

I have a MK charger
And red doesn't mean a bad connection
It's a very low battery

If it were me
I'd pull the batt's  and charge them with a reg. batt charger
And after that, I'd check the voltage of the batt's

There's a point were a MK charger will not charge a batt. (or bring up a batt.)
And it sounds like your batt. or batt's are under that.

[Mike S.]

That could be. I neglected them all winter. Never once plugged the charger in. They are totally dead. I also filled the water with them dead. I will try that. Thanks.

[Manxfishing]

Cool,

I've had the problem before

[thedude]

most digital chargers require a minimum voltage to even register a battery exists - so that's likely the case. Given you just refilled them too - the standard charger should do the trick or your batteries are shot.

[BIGSHOW]

Could always take em in to any auto zone or car parts store and get it checked for free.

[Mike S.]

I put one of the batteries on my other charger for a few hours today. I just went and plugged the onboard charger in, and it worked. The number 3 battery showed an orange light instead of red. I now have another one charging until I go to bed tonight. Then I will hook the third one up. When I get up for work, I will plug the onboard charger in and be happy. I'm glad I posted this rather than buying another charger.   

[customfishn]

If you killed your batteries by neglect Ill sell you my one year old set of 3 for next to nothing.  Or if you have a 24 volt trolling motor I have 2 new group 31 batteries Ill give you a good deal on

[Mike S.]

I'm sure mine are ok. They're all charged up now. I sure hope I didn't kill them. They're only 2 year old Deka 31's. I don't want to buy 3 more of those right now. My starting battery is fine. Thanks for the offer.

[Skulley]

If you killed your batteries by neglect Ill sell you my one year old set of 3 for next to nothing.  Or if you have a 24 volt trolling motor I have 2 new group 31 batteries Ill give you a good deal on

I'm going to PM you because I am in the market for 2 new Group 31 batteries. I own the same charger.


BD.                            

[Big dreams]

Great Post!!!  I had the same issue this weekend.  I read this post and charged the crank battery...now my MK charger is showing the 3rd battery is charging/charged.  Thanks to all for their input.