If you see a spark then something is on pulling power from the battery. If everything is turned off on the vehicle then you should not see any large spark. You will see a very tiny spark because the radio presets and the clock will be drawing a slight amount of power, but if the spark is very large then look for something that is pulling power. A light on somewhere or a stuck relay.
Hook up a battery charger to it.
I would suspect a loose or corroded battery cable. Remove the negative - cable first and clean both cable connection and the battery posts. Hook the positive + cable back up first. Can also be a starter solenoid going bad.
Sorry, your question needs clarification. You need to be more specific. Are you trying to perform a jump-start? Are you replacing the battery?
It depends on the battery charger. Some chargers will detect that they're hooked up backwards and do nothing. More than likely though it will dis-charge the battery pretty quickly, and probably damage it.
It could be poor battery connections, the starter,
You can hook the battery charger to the battery in the trunk, or to the jump start posts under the hood.
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Connect negative (-) black cable first. Then connect positive (+) cable last. You will see a + and a - next to the posts. Hook up positive first, negative last.
The solenoid will have two big posts and one or two small posts. Mark and remove the wires from the small posts. If you have one small post you can hook up a jumper wire from the + side of the battery to the small post and it should make the starter crank over. If it has two small posts hook one jumper from the + side of the battery to one of the small posts and another jumper from the - side of the battery to the other small post. If it is OK it will engage the starter. If you get nothing then the solenoid is bad.
one negative post to one positive post on the other battery. The remaining posts (one on each battery + and - ) would go to the circuit you are trying to power up.
Hook positive up first, negative last.
You are completing the electrical circut, causing the electricity to jump through the air to the battery to complete the circut as quickly as possible. Something is on pulling power. Can be just the clock & ECU if the spark is very small. Or can be some lights if the spark is large.
The battery is under the front passenger seat. You hook jumper cables to the jump start posts under the hood. You will find a red cable and a grounding stud near it to attach to.
Hook up a battery charger to it.
You always disconnect the battery before you take the airbag off. It is possible to have a spark when you unplug the airbag if you leave the battery hooked up. The same thing when you put it back . Reassemble the steering wheel before you hook the battery up.
Take a voltmeter and hook it up to the battery posts and read what the voltage is. It should be 12 volts or more. Now start the motorcycle and check the voltage, if it goes up, it's charging. If not, check the battery to make sure it is not dry.
On a car battery, the cables attach to two metal posts which stick up on the top of the battery.