I have new battery and alternater however sometimes the amperage charging does not reach my battery. I have checked connection at alternator it is good , checked connection at starter it is good, checked battery connections ,good also. Question. Does the wire from the alternater go directly to starter post or does it go through some relay or perhaps ignition before getting to the battery? That is where the problem has tro be. Your thoughts please.
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The car is having power drained somewhere. Check for an electrical short or some kind of "on" power source. Good Luck!!----------------------------------------------------------------------------------- ECU Chip Tunning Tools
if you didnt check the amperage the battery is going bad it may read 12 volt or 36 volt depending on the wiring but if it will only charge a 3rd of the way then the battery needs to be replaced because the amperage is not there to completely charge so it will lose power do to lack of voltage/amperage. I hope this helps
Even though new-ish, I'd still suspect the battery has no charge, ask a friend to give you a jump start. Then give your car a good run, 20 miles, if is doesn't work again the next day either the battery fails to keep its charge or the alternater isn't charging it. A good garage will be able to test either for you, you'll need to change the failing part.
you may have a problem with the alternator sometimes not charging,may test okay sometimes, take a good look at the alternator and also make sure nothing is staying on, like inside lights, glove box light or brake lights, keep an eye on these things when parking the car for the day,something may be draining the battery down slowly.
You could have a starter that draws too much amperage or a bad ground. Check your grounds at the battery cables and check that the battery is fully charged. You may have an alternator problem. If the battery is fully charged check the starting and charging systems and that will tell you your problem.
sometimes you are just the unlucky soul that gets bum alternators or your battery in the truck has enough juce to crank it over but is almost dead and your alternator is burning up trying to charge a battery that wont accept a decent charge. plus clean the battery terminals
Ok, i understand that you have replaced the alternator, but there seems to be a non charge state in this case. i recommend checking the charging system. use the procedure below to isolate this issue.
Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). The battery in this illustration has a protective cover over the positive terminal to prevent short circuit in case of an accident. Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)
To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)
The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)
Next, you will need to check the alternators output with the Amp meter.
Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.
((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))