I HAVE A 1999 TOYOTA SIENNA. MY ALTERNATOR WAS TESTED ITS WORKING. I'M TRYING TO LOCATE THE FUSE TO THE ALTERNATOR (I WAS TOLD THERE IS ONE). JUST TRYING TO TROUBLE SHOOT BEFORE BUYING ANOTHER BATTERY WHICH IS ABOUT 2 YEARS OLD IT HAS WATER IN IT (NOT MAINT FREE). WHERE AND WHICH IS THE FUSE TO THE ALTERNATOR. I FOUND THE MAIN FUSE BOX
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Re: BATTERY NOT CHARGING OR WONT HOLD A CHARGE
Just need to change battery Take it back and get a betterment from the auto parts store for another / What this means is that in your case its a four yr battery will warranty half and give you another at usually half the price of a new one if you have the receipt/ Please rate my repsonse thank you very much
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have a load test done on the battery but I suspect that it is not the battery but an alternator not charging and the electrics are running the battery down
have an accredited auto electrician check the alternator and voltage regulator for correct operation
Check the main junction box .
This is ware the battery power is disturbited to all systems a bad connection here will cause some funny problems that work sometimes but not others over the entire range of systems in the vehicle .
What you have is a main power issue .
If the battery is so good why won't it hold a charge.
What kind of test have you done to check the ALT and Bat .
Do you have more information that help me understand how to help you
This is easy to test but you need a multimeter. Connect the multimeter to the battery and run the engine at a fast idle (say 2000 rpm). You should get a voltage reading anywhere from 14 to 15 volts if the battery is fully charged and the alternator is working. If the reading is around 12 volts, then the alternator is not working.
You dont need a computer. You need a new Body Control Module. Located under the center console but forward towards the dash. A very common problem with these cars. NOT A USED ONE....A NEW ONE. They are VIN specific.
well it could be a bad alternator or it could be a inline fuse on alternator wire going to battery charge battery and see if car still starts if it does let it run and see if it is charging if it is suspect bad battery if it is not charging check fuses and test alternator and replace what doent work hope this helps let me know prob.
Sounds like your alternator has gone bad. The alternator is responsible for charging your battery back up for you as you drive. You can have this tested if you take it off and take it down to your local auto parts store. Let me know if you have any other questions. Thanks for rating my respones and for using FixYa!
clean battery terminals ,bring battery to be tested after charging, after reinstalling battery run car and test alternator output it should be a minimum of 13-14volts if it is under 13 replace alternator , use a voltmeter set on 12 volt 10 amp dc to check the wire to check is located on the back of the alternator covered with a rubber grommet of course hold negative wirw on volt meter to ground and touch red wire to big terminal on back of alternator while car is running should have 14 volts or at least 13 volts