take off both terminals clean them with sandpaper or wire brush and do the same for the battery.
On Board Diagnostics I ( it should have an EEC TEST connection in the engine compartment somewhere near the battery )
Then replace it.
Dead battery or dirty/loose battery connection.
A completely dead battery or a bad connection to the battery.
Physically remove the horn from the car. Ground it to a good ground on the engine, or car body. Attach a lead to the positive ( + ) side of the battery, with the free end, touch the connection on the horn and it should blow( sound ).
have your alternator check. It is like that for most car. It is not the battery's fault. But you could have a lose connection to your battery.
it will leak from the positive connection becauase the positive connection is what is under place of the acid
touch the wires to the battery terminal
Black negative red positive.
No, you must use a battery with a connection for the vent tube to route battery fumes out of the car as the battery is stored in the trunk.
Put the red test lead on the positive and the black test lead on the negative post of the battery and see the result.
To troubleshoot issues with your RC car's jumper connection, first check that the jumper cables are securely connected to the battery terminals. Ensure there is no corrosion or damage to the cables. Test the battery with a multimeter to confirm it has sufficient voltage. If the issue persists, try using a different set of jumper cables or battery to isolate the problem. If the problem continues, consult the manufacturer's manual or seek professional help.