360 battery won't charge

Either disconnect the battery and see if you can revive it OR (recommended) get a new battery. Batteries really don't like being taken to zero and these cars don't like weak batteries. At the best case, charging with the system on is a bad idea and worst case it can be catastrophic. Spend the $ on a new battery. Also, it should hold 3-4 weeks so you need to track down the current leak. Start measuring across all fuses and find what is drawing the power.

 

Tenders are meant to maintain not resurrect a dead battery.

Two choices....
1. Get new battery
2. Put old battery on a charger after disconnecting all leads from car

 

You pull the emergency cable. The handle is under the steering column (more on the left if you have a left hand drive car).

Regards,
Joerg

 

How old is your battery? If its over 4 years old I say replace it ASAP before it dies on you when least expected. Batteries are cheap.

As other members have mentioned above, battery tenders are designed to maintain a battery. It doesnt have enough power to revive a dead battery. You will need to use a battery charger.

And as others have said, if your battery is constantly getting drained down you need to find the root cause otherwise when you will always have battery issues and our cars ECU's are very sensitive to low voltage and voltage fluctuations. You may experience all sorts of electrical gremlins.

The source of battery drain is usually easy to determine. Most often its aftermarket electrical product addition, and also the overhead light.

 

First off, grab a voltmeter and see what kind of voltage your battery has. Depending on your tender, the will not even start charging if your battery is under a certain voltage. I had this happen when I had an Odyssey PC925 installed. Came back after a week long business trip to find the battery was under 6 volts. Had to hook it up to another battery to revive it and then leave it on the tender for a couple days to get it back to 12.7. It was only a few months old but I repalced it with a bigger battery anyway.

 

Both are possible.


Sent from my iPad using FerrariChat

 

If it's an AGM battery, you might need to follow these instructions.
https://www.hotrod.com/articles/hrdp-1009-how-to-charge-a-agm-battery/

 

There are so many posts here about electrical gremlin issues that turns out to be defective battery was the root cause,

From malfunctioning F1 sytems, clutch engagement issues, fault codes being thrown, weird warning lights, etc.

Simply put, Ferrari ECU's are sensitive to low voltage, voltage fluctuations, and I understand over voltage or over current can actually fry / burn out some ECU's that's why Ferrari does not recommend jump starting.

So I make it a habit to ensure my battery is always fully charged either by driving my car regularly or hook it up to battery tender when I'm out on travel.

My experience also shows most batteries only last 4 years max so I replace mine preventively after its 4 years old as nothing is more embarrassing than people coming over to admire your car, then one day when you're ready to leave your car wont start.

And I highly recommend AGM so that you wont have to worry about acid leaking destroying the metal battery tray. Ask me how I know............

 

Tenders aren’t always great at charging flat batteries, they’re meant for maintaining them.

If the battery goes flat, try to put it on a charger before writing it off.

 

I change my battery every 4 years period. $100 is cheap. Once a battery gets depleted, they always seem to give me grief.

 

Remember that the newer/smarter chargers/maintainers will not begin charging if the voltage is below something like 11.5 or 12 volts. So you have to connect a charger that has a "supply" setting like the CTEK 7002. After about an hour the battery will charge to the voltage for the smart charger can safely monitor the charge rate. And of course, the cables don't have to be disconnected just switch off the ground at the switch in the trunk.
And another handy tool is any one of the Bluetooth battery monitors that continually monitor the state of battery charge. I am using the "BM2 Battery Monitor 4.0 Device". It draws 1 ma and will upload to your phone when u r within 15 feet with your phone, about $30. And the app that runs them is free. I have tried about 4 different brands and the CTEK Bluetooth monitor is flakey and yet they make GREAT chargers!?

And of course, I do not own either company or sell either device......

Jeff Pintler
89 348tb, 86tr, 99 360 3-pedal, 05 S-160 bobcat