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Called aaa and they told me that my alternator is going bad that every time I use a my radio, headlight, ect, the alternator drops to 12.77 Would this have to do with the battery going bad or is simpl

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  • Cars & Trucks Master
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Are you test your battery? Is low time or new battery? Also, check for some parasityc drain there; test ground wires and harneesses connections cleaning.

Posted on Nov 07, 2012

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Where is the ects relay on 2001 tundra


doing that (reverse battery,) blows up very extensive electronics.
fuse that look good can be in fact bad.
A pro never guesses, we use a magic $8 tool (walfart) called volt meter to find them.
every time. no guessing. the the mains are huge
too bad you never told what exactly what you did.,
1: removed battery plus cable first (wrong) and wrench hit steel>?
2: installed the battery backwards, boom"
3: removed the alternator , hot or starter (boom)

know what you did ,tells me which fuse blew., for sure.
the voltage will be on both sides of fuse. if fuses is good,some
need key on to be hot.
(rare exceptions)
some cars have fuse links that look like wire are are NOT.

you have no power to the radio ,now, the voltmeter is 0v
there.
so you back up from there
but why
why not start at the travesty area, the battery and check all PDC fuses first for 2 x hot each. need a ASE TRAINING video have it.
fuse that look bad are
fuses that look good,can in FACT be bad, gawd made is a meter
and bingo we are all blessed with truth.

Dec 08, 2014 | 2001 Toyota Tundra

2 Answers

I ve vchanged the battery and alternator on my 94 nissan sentra and the system still wont charge what is the cause


My friend is a Honda Vehicle Technican who owns a 1994 Nissan Sentra which had kept dying on him. He had called the AAA driver who stated that the alternator was good as noted on the print out report when the AAA driver ran the check on the system. It turned the alternator was bad, which somehow also affected the starter. While the AAA driver had jump started the car, the ignition switch relay got broken; and the small positive cable connection got a short; so it all, he replaced the alternator, the starter, the battery and got a new battery cable connectors, ignition switch relay and fuse for the inside of the interior lights -- and he has no problems since after spending 4 days on this problem. It would had been easier had he had a lift and the right equipment but nevertheless he got it done but missed his work -- but at least its fixed.

Jun 08, 2012 | 1994 Nissan Sentra 4-Door

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02 F250 7.3 battery light just came on, is this indicating a bad alternator or battery. Other than the light there are no symptoms so far


The light can be on because the charge or ALT fuse under the hood in the fuse/relay center is blown, or the alternator itself is not producing enough voltage.

Apr 28, 2010 | 2004 Ford F250

2 Answers

Our 1983 chrysler imperial has had some issues within the past few months. My husband rebuilt the intake thinking this would help. The car has been idleing high in park and very low when in reverse to the...


hi There
I have read your report. Yes your dad is right. Check the alternator. Because if it goes bad your car will loose power and it would be hard for your car if had lights radio a/c on. The relay in alternator dose go bad and sometimes you get a bad one also. Try this tip when you start your car take the positive cable off the battery and if it dies. Then it's your alternator. just remember that little trick. Hope this info helps. and thank you for writing to fix ya.
Best Regards Richard

Dec 04, 2009 | 1983 Chrysler Imperial

2 Answers

Battery indicator after new alternator Audi A4


Take it to an Audi dealer. Could have been a bad alternator, and another bad alternator if they didn't use Audi part. Don't use cheap rebuilt Chinease stuff on your Audi.

Jul 02, 2009 | 2000 Audi A4

1 Answer

1998 Suzuki Esteem with charging problems


Very easy job, but i would recommenend taking the alt out and going to a local auto parts store and checking it to make sure it is ok or bad first then buy one

Feb 09, 2009 | 1998 Suzuki Esteem

2 Answers

1996 Dodge Caravan Electrical problem


Its sure sounds like the alternator to me. If you have a battery charger charge the batteryup for an hour or so start the van and if you have a volt meeter put it on th e battery and see what it reads should be around 13.6 volts make sure everything is off at this time heater radio ect if that reads around 13. volts now turn on the light s radio heater and 4 way flashers and see if the voltage starts to drop if it drops below 13. volts the alternator is bad also if the battery is over 4 years old replace it.If all elese fails take it to a well know repair shop

Jan 07, 2009 | 1996 Dodge Caravan

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