The way an alternator works is it has to have what is called a voltage sensing wire, which tells the alternator what level of charge your battery has and how much the alternator needs to put out. If your battery cables are corroded or damaged you can change the battery and alternator every week and the problem will persist. I would start buy checking cables and sensing wire (wire from alternator to battery) and be sure they are free of coorosion and visible damage. if all appears good then do a voltage drop test on battery terminals and cables. also voltage drop test on voltage sensing wire (wire form alternator to battery). this series of test should give you an answer. any further questions feel free to ask.
SOURCE: 2003 ford ranger battery light comes on
i think it is the alternator because the idiot light is connected to your regulator of your alternator. it is an indication that your alternator is not charging anymore.
tnx 4 using fixya,
drcool
SOURCE: emergency brake light comes on while driving
The wire that connects to emergency brake is loose, and grounding out. It probably just needs to be tightened up.
SOURCE: my 2008 nissan frontier truck is dead
Charge the battery if the truck starts its fixed if not i would have the alternator checked. if the truck is under warranty which it should be i would have it towed and checked by nissan
SOURCE: installed new alternator and car battery still will not charge.
did you unhook the battery prior to installing the alternator
SOURCE: battery goes dead after two of sitting, bought new
there might be some kind of short drainin your battery or your alternator may not be workin not chargin the battery
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