My battary light was on so I took my truck and had the altenator and the battary tested, replaced the battary and the light still would not go off, then lost all power and truck died and will not restart, makes sound like battary is dead. HELP HELP HELP!!!!!!!!!
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Re: Battary light would not go off
Have the battery and the alternator tested under a heavy electrical load. Some of the cheap battery testers will not indicate a bad or weak cell. Also your alternator may not put out enough amperage to keep up with the electrical demands placed upon it. A good battery tester is a carbon pyle tester. Good luck.
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what you need to do is check the altenator for voltage it should be between 13 and 15 volts this is easily done with a standard volt meter check it at the altenator witch is located right on top of the engine on the back of the altenator there is a thick red wire that is where you want to put the positive and just put the black wire of the volt meter on the case of the altenator and check the reading it sounds like the altenator is bad there is also a fuse you should check your owners manual for location of the fuse also have your battary checked this should help ant questions just ask me
dous battary light come on while driving? if so .could be a faulty voltage regulater in the alternater, or the fan belt could need adjusting! also check your battary connections to see if there clean and tight.
You have a bad alternator and or regulator. Many places will test these for free. Drive to a parts store and ask to watch them test you're electrical system.
You have a two part charging system. One is the Alternator the other is the regulator. These are many times made into to one intricate system or ONE PIECE that must be replaced both at the same time.
Please have your system checked before and after replacing the alternator/regulator.
If you have an Advance Auto near you - or Auto Zone - call first and ask if they will check your alternator for proper operation
HI, what your are experiencing is a Battery drain issue.
There are one or more devices that are not shutting down during the downtime of the vehicle. this will cause the battery to drain overnight. You will need to isolate this drain and fix it asap if possible.
Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights. Now about the "miss" in the engine. We would suggest doing a cylinder leak down test, also check for a "flat" cam. If the problem still exists, scan the PCM (computer) for trouble codes.
On an American designed charging system the truck should remain running, on Japanese cars it will die, but to anser your question yes you almost surely have a defective alternator. Make sure the battery is fully charged before the new Alt. is installed, if you don't the new Alt can be overheated and damaged.