Need to charge 12v car battery

Question edited for clarity.
Question moved to Schumacher category.

The AI Chat GPT4 answer has been deleted.

Schumacher have a great Support system and in most cases the manuals have the wiring diagram at the back.

Battery Chargers Archive

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here is something similar...

Schumacher SE 5212A Charger Diagram:

The underhood connections can work by themselves...POS to POS, and NEG to NEG...sometimes dirty/weak connections do not allow the power to transfer fully from the underhood connections...if this is the case then you need to connect directly to the battery in trunk for full power charge...again POS to POS, and NEG to NEG...hope this helps

Probably not worth repairing. Meaning, the cost to repair will most likely exceed the value of the charger.

use meter it will give u a negative reading if your leads are backwards

It's possible you may have a poor connection from your car to your car battery. Check to make sure both battery terminals are on your battery tight. Tighten them if necessary, then try again. If either one was loose, that should fix the problem. Then there may be nothing wrong with your battery charger.

Go to www.centurytool.net/SE_520MA_Schumacher_battery

For connecting multiple items to it, without knowing where the pos and negs are its hard to say exactly what they are. Is it on the input or output side of the inverter? Do you have a connector to connect to the cig lighter plug or battery terminals??

Red attaches to the POS or the + termnal. The Black clamp can attach to the NEG or the - terminal on the battery ... or any part of the engine. Assure the charger is in the off position when you connect. Assure it is on the Charge position if you are charging the battery. If you are trying to start the car, put the charger on the START position and let it sit on the battery for 30 seconds before you try to start it. The best way to get your car going is allow the charger to charge the battery on CHARGE setting for an hour or more first.

Incidently, I have a charger exactly like yours ...

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