To properly diagnose most electrical issues you will need a multimeter, which is a test tool that is used to test electrical current, load, and resistances. There can be several potential issues that can cause a battery to discharge. If the battery is discharching while the machine is sitting for a short period of time, there is some current draw in the machine that is using electricity; suspect a shorted out connection. However, if the battery is failing after being ridden, then the culprit could be the charging system. The procedures to correctly diagnose either of these problems, along with a host of others, can be found in your model year's Service Manual; for around fifty dollars, it is a very wise investment.
Modern Harleys have an alternator that not only keeps the battery charged but also provides power for the lights, horn, etc. It works in conjunction with the voltage regulator which controls how much of the alternator's power goes to the battery and how much goes to accessories. Harley Big Twins built before 1970 used a generator instead of an alternator.
Because you over-use it
Because its a old car and you used to long
Is it new? if it is it's not the battery. If it's really old your battery most likely is leaking.
battery hooked up backward, wires crossed somewhere or it could be the solenoid.
A car battery would keep dying because inversely, the lesser the battery is used, the dying process continues. The more the battery is used, the lesser the dying process. But the dying commences and continues , the moment the car engine is not used. Thus, as often as the car is being used, the dying "resumes" the moment tne engine stops. And the faster it is used again, the slower the dying process.EVerytime the car engine is used, the battery recharges, thus life is given back to the battery. Once the engine stops, the dying resumes. This is why the car battery keeps on dying (everytime the car engine is not being used)
Possibly a bad alternator. The Alternator charges the battery when the vehicle is running. If the battery is not being charged this could cause the vehicle not to start.
have the battery tested, average life of a battery is 2 to 3 years. if battery is good check voltage regulator and starter motor. there is a short somewhere if the battery is good
probably clock and/or alarm system - draws a lot of power
how old is the battery? batteries have a life of about 3 years. check the alternator, the voltage regulator,and the battery check the battery cable terminals for cleanliness and make sure they are tight
If you have no power to anything, and your battery isn't dead, then you more likely have a bad ground. If the battery is dead/keeps dying, there's a good likelihood that the alternator isn't charging it adequately.
An alternator keeps the battery charged in a vehicle. In a 2006 Chevrolet Impala when the alternator fails the battery will keep dying and no power will be available when attempting to start the car.