THE ENGINE TURNS OVER VERY SLOWLY WHEN I START THE CAR. I HAVE TESTED THE BATTERY AND ALTERNATOR AND THEY APPEAR TO BE FINE. I STARTED THE CAR WITH THE TESTER ON THE BATTERY AND IT PULLED THE VOLTS DOWN TO ALMOST HALF OF THE 12 VOLT METER. COULD THIS BE THE STARTER ABOUT TO GO OUT?
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If the battery has been overcharged then the cells will be damaged . Have a load test done on the battery to confirm failure and if so then get a new battery.. have the alternator checked at the same time because there is a possibility that the regulator in the alternator has been also damaged allowing over charging of the battery. By having incorrectly connected the jumper leads then you may have also damaged the cpu unit of the engine management box. Best have an autro electrician look at it .
Car batteries are very powerful. It's not uncommon for lights and radios to work eventhough the battery is too weak to turn over the engine.
I would try to find someone to give you a jump start. This would atleast help determine if the battery/charging system is the problem.
If it does jump start, let it idle for 10 minutes or so, then turn the engine off and try to start without a jump start. If it does start that would mean that the alternator is working properly. But, if it doesn't start you could have a bad alternator.
If you are able to get the car to a parts place most of them offer a free diagnostic test on batteries and alternators.
The slow turning of the engine indicates the battery is getting week. Gradually get so weak that only the clicking occurs. Next will be nothing at all because the battery is dead. Can be checked by turning on the lights. The battery can be dead because it was getting worn out or because the alternator was not charging it. It may not have been charging it because the alternator was bad or because the connections to the battery are corroded. Corroded connections at the starter motor should also be checked. Bad time to not have a boyfriend who understands such things. Good luck.
you should get the battery tested. Alot of them fail this time of yesr. Once you determine the battery and have the alternator tested then you beging to daignose deeper. Most people are not aware that even tho an alternator is charging it can have an internal diode short that can cause the battery to drain when the car is sitting with no key in it.
Check for loose battery terminals. Car will not start without jump because battery is not connected properly. Starter is probably good or car would not start with or without jump. If alternator is bad and not producing current, car would die after running a short while as battery would out of juice and without alternator current the car would die - so probably alternator is good. If connections are all good, get a voltmeter and test the battery voltage - it should be over 12.75 volts. If not, battery is not holding charge.
i'm looking to get a new battery for my 05 plate toyota corolla verso. Im trying not to go to Toyota as they charage extortionate prices . Can anyone help as to what battery i will need and is the cheapest batteries on the market worth getting