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How to install an alternator fuse - Cars & Trucks

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Does your vehicle have a fuse that says
in the owners manual it is also for the alternator?
Have you tested any fuse in question?
Do you have a reason to be looking for a fuse

Posted on Jul 19, 2013


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Posted on Jan 02, 2017


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Will a blown fuse keep a dodge the coda 2000 with a 4.7 from starting the fuses 140 amp fuse that runs from the battery to the alternator

Hi Kelly, IM AL the owner of Big As Auto Repair.

YES Kelly that fuse will keep the vehicle from starting, If you install a new fuse and it blows again you most likely have a shorted alternator, to check it out, simple unhook the power wire from the back of the alternator, install a new fuse and if it does not blow again then replaced the alternator with a new one. CAUSION: Please be very careful not to let the power wire from the alternator touch anything be cause it can melt something. Best way is to unhook the battery, take the wire off and wrap it with a towel then hook the battery back up and do your test with the fuse. Hope this helps and please visit my auto-repair-website:

Feb 17, 2017 | Dodge Cars & Trucks

1 Answer

Where is the fuse for the alternator in a 2000 murcury sable

There are three fuse's for alternator ! One in the under hood fuse box, F126 30amp, one in the central junction box F227 10amp an there is a 175 amp fuse or fusible link installed in the heavy gage wire from battery to the back of the alternator . Rather then tearing the vehicle apart looking for fuse's , take a volt meter an check the wires at the alternator an see if your missing voltage at any wires . Does the charge light or battery symbol light come on when you turn the key on ? If so you have eliminated one of the fuse .

Sep 13, 2015 | 2000 Mercury Sable

1 Answer

Briefly installed battery backwards. 2000 Ford Ranger. New Battery, new alternator, but alternator not charging battery. Truck starts on battery-new starter motor. Lights work, all electrical works

Is this the alternator that was in the vehicle when you hooked the battery up wrong? If so, you probably blew out the voltage regulator in the alternator.


Jan 11, 2015 | 2000 Ford Ranger SuperCab

1 Answer

1990 Honda 60 amp fuse blows immediately

did you follow both fuse wires,
there are up to 3 fuses there.
one is alternator. if the fuse goes to the big alternator wire
the alternator is shorted inside, (diode pack blown)
that is how i do it.
you can read the FSM , its there
free here

Aug 03, 2013 | Honda Civic Cars & Trucks

1 Answer

Battery tested dead, bought new battery and installed it but the alternator test read no voltage... tech said that 2000 sentra has had problem in which blown lamp circuit fuse can cause a no voltage...

Yes. You may check the fuse frist but usally the alternator when it goes it goes and that is it. There is one fuse for that and it should be under the hood of the car. if that is good insatll a new alternator.

Jul 10, 2011 | 2000 Nissan Sentra

2 Answers

Have charged the battery on my 1999mitsubishi mirage

you may connecting it wrongly , please check +ve and-ve both pole are to be fix with proper wire, if will do wrong it will blow fuse.

Jan 31, 2010 | 1997 Mitsubishi Mirage

1 Answer

It keeps blowing the ECM Fuse, checked wiring but

My friend;
Try this;
  1. Did you insert same valued fuse i.e. { fuse rated 15APS with same fuse}.
  2. Check OP'S & voltage of the Alternator = 13.7 V DC - 14.8 V DC MAX.
  3. are you sure NO internal shorttings inside the ECM.
How to Test a Car's Alternator =related

Diagnosing an Alternator Problem:
how car alternators work

How to Install the Voltage Regulator on an Alternator
How to Rebuild an Alternator

How to Test a Car Voltage Regulator

Try it, & let me know if I add any benefits to you.
I hope I add some thing valuable to you.


Nov 06, 2009 | 1987 Chevrolet V30

1 Answer

Battery light shows on alternator after installing a new alternator and new battery

Check and see if you have an alternator fuse. Sometimes that fuse snaps and your first thought is the alternator is no good and replace it, and still drain the battery because its not charging. There is also a possibility of a defective alternator.

Jun 20, 2009 | 2002 Kia Optima

1 Answer

Replaced alternator now won't start

hello first check your fuse panel inside and under hood test all with test light if all fuses are good trace main power wire from back of alternator for a burnt fusible link i think its just a snapped fuse when installing new alternator the pos wire on back might have touch the bracket grounded snapped the fuse look good at the fuses goodluck

Sep 18, 2008 | 1994 Acura Legend

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