12 Volt battery died now can not charge my main battery

[94ragtop]

I bought this little fellow to play with and found it fun to drive, left parked unplugged at my office and the 12 volt battery went dead, recharged the 12 volt battery, and can not get the hybrid battery to charge or get the car to go into drive mode, eventhou I have 5 bars left on the gas (smile) gauge... is there anything I need to reset if the 12 volt died...??? Help please... Thanks Jim

 

[94ragtop]

Update I put a brand new 12 volt battery in today and the car still wont engage and move... Not sure what the heck is going on...any ideas will be helpful, you can email me at [email protected] tag the email battery...thanks Jim

 

[kiev]

left parked unplugged at my office and the 12 volt battery went dead, recharged the 12 volt battery, and can not get the hybrid battery to charge or get the car to go into drive mode

i suspect that your 12V battery is old, weak or worn out. Even with a recharge it may not have sufficient capacity to start to READY anymore. Recharge fully and perform a capacity check to determine if it is up to the task.

A lead acid battery must be kept fully charged all the time or else it will be damaged by sulfation of the plates.

 

[kiev]

Did you charge the "new" battery before putting into service? New Batteries sit on the shelf and can lose their charge, they are not kept charged at the parts store. Check the date code on the battery to get an idea of it's age.

 

[94ragtop]

I thought the same thing, so have it on the charger all night, but I did check voltage and it was over 12 volt... Crazy thing was, my 12 volt died after sitting parked for about a month, I put my 12 volt charger on it, next day got it started and drove around doing several projects. when I pulled it back in my shop to charge the main battery it just would not go up, hence my thoughts on a new battery, I am going to try it again tomorrow and see if it will charge my main battery.. Sort of scary, its not good for more than 40-45 miles now as it is, but if I can not get her charged... Not going to be worth much at at...ratt finks... (smile)

 

[94ragtop]

i suspect that your 12V battery is old, weak or worn out. Even with a recharge it may not have sufficient capacity to start to READY anymore. Recharge fully and perform a capacity check to determine if it is up to the task.

A lead acid battery must be kept fully charged all the time or else it will be damaged by sulfation of the plates.

Thank you sooo much for responding I am at a loss on what to do about this dilemma

 

[MickeyS70]

Crazy thing was, my 12 volt died after sitting parked for about a month, I put my 12 volt charger on it, next day got it started and drove around doing several projects. when I pulled it back in my shop to charge the main battery it just would not go up, hence my thoughts on a new battery,

It could well be that the 12V battery isn’t the main issue here and the OBC is faulty also. One of its jobs (DC/DC section) is to supply low voltage to power all the systems (and charge the aux battery) when in Ready (driving) or charging.

If that’s not working, all the power is coming from the small battery and wears it down quickly, therefore best to check the voltage across the battery terminals in READY (should be >14VDC)