Question about 2005 Ford F-150

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Paul, bought alternator at o'reilys Said 2 sizes took 1 with more amp output. put on on Tues.and gages crazy. new battery today should exchange 4 less amps?

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Amperage will not affect the guages. You need to have charging system analysed for voltage and amperage output. Hook a voltmeter across the battery while running and you should have 14.1-14.3 volts. If not there is a problem with wiring or even a bad alternator even though its new

Posted on Apr 11, 2015

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There no reason why the bigger alternator drive the gauge crazy in that case the bigger the better you can drive more electric conponent

Posted on Apr 11, 2015

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1 Answer

2000 Dodge Durango Alternator replaced but wireing is different??


You may have already resolved this issue.
First, which engine do you have, and which amp alternator ?
I am only showing the main battery terminal and a two wire plug on the back of the alternator.

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2002 pontiac grand prix se 3.1 battery light on


had almost same proublem with my sons car ,after two alt and a battlater ,found a loose connection at starter tha was causing the proublem all is well now might want to check

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My 2005 Pontiac Sunfire has had several problems over the past couple of months. When I was driving all my gages went to zero when I would start to break. After I started moving again they would go up....


Your car's symptoms (voltage fluctuations under load that shouldn't happen) seem to
strongly indicate that your voltage regulator has failed. The voltage regulator is the component
that regulates voltage coming from the alternator, and which is supplied to the rest of the car.
Your new belt tensioner indicates to me (and should have to your mechanic) that the
alternator and/or voltage regulator weren't able to operate properly, and a faulty belt tensioner
has killed more than one car's alternator/voltage regulator.
Your do not need new headlights. Do fix the turn signals.

In the 2005 Sunfire, the voltage regulator is an integral component of the alternator, and is
not separately serviceable. So your 2005 Sunfire needs a new alternator.

2005 Pontiac Sunfire Alternator - Duralast Part Number: DL2305-15-4 $199.99 available at:
http://www.autozone.com/autozone/parts/2005-Pontiac-Sunfire/Alternator/_/N-jmqtpZ93xme

The national parts chains (Advance Auto Parts, AutoZone, Pep Boys) will (for free) administer
a "Charging System Test." Which will telly you for sure that your alternator/voltage regulator
is bad. Do this before replacing alternator, since its a pricy part in the 05 Sunfire.

Just in case, Here's the 2005 Sunfire manual entry on (a) Diagnosis & testing the alternator, and
(b) replacement of the alternator

Alternator replacement is a do-it-yourself project, though you may need to get a
"Serpentine Belt Kit" on your favorite parts store's loan-a-tool program to remove/re-install the serpentine (drive) belt.
======================================================================
Diagnosis & Testing - 2005 Pontiac Sunfire Alternator


Alternator Load Test

1. With the engine running, turn on the blower motor and the high beams ( or other electrical accessories to place a load on the charging system).

2. Increase and hold engine speed to 2000 rpm.

3. Measure the voltage reading at the battery.

4. The voltage should increase at least 0.5 volts from the voltage test. If the voltage does not meet specifications, the charging system is malfunctioning.
NOTE
Usually under and overcharging is caused by a defective alternator, or its related parts (voltage regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.




Alternator No-Load Test

1. Connect a tachometer to the engine.
CAUTION
Ensure that the transmission is in Park and the emergency brake is set. Blocking a wheel is optional and an added safety measure.


2. Turn off all electrical loads (radio, blower motor, wipers, etc.)

3. Start the engine and increase engine speed to approximately 1500 rpm.

4. Measure the voltage reading at the battery with the engine holding a steady 1500 rpm. Voltage should have raised at least 0.5 volts, but no more than 2.5 volts.

5. If the voltage does not go up more than 0.5 volts, the alternator is not charging. If the voltage goes up more than 2.5 volts, the alternator is overcharging.
NOTE
Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.


6. If the voltage is within specifications, proceed to the next test.



Voltage Test

1. Make sure the engine is OFF , and turn the headlights on for 15-20 seconds to remove any surface charge from the battery.

2. Using a DVOM set to volts DC, probe across the battery terminals.

3. Measure the battery voltage.

4. Write down the voltage reading and proceed to the next test.



Removal & Installation - 2005 Pontiac Sunfire Alternator


2.2L (VIN 4) Engines

1. Before servicing the vehicle, refer to the precautions section.

2. Remove or disconnect the following:

Negative battery cable

Accessory drive belt

Alternator mounting bolts

Alternator electrical connectors

Alternator





To install:

1. Before servicing the vehicle, refer to the precautions section.

Alternator. Torque the upper bolts to 37 ft. lbs. (50 Nm) and the lower bolt to 22 ft. lbs. (30 Nm).

Alternator electrical connectors

Accessory drive belt

Negative battery cable





2.2L (VIN F) Engines

1. Before servicing the vehicle, refer to the precautions section.

2. Remove or disconnect the following:

Negative battery cable

Accessory drive belt

Alternator mounting bolts

Alternator electrical connectors

Alternator





To install:

1. Install or connect the following:

Alternator. Torque the bolts to 16 ft. lbs. (22 Nm).

Alternator electrical connectors

Accessory drive belt

Negative battery cable

Sep 05, 2011 | 2005 Pontiac Sunfire

1 Answer

This weekend I put in a new battery, replaced alternator (O'Reily's autoparts) on 1994 towncar. Took it back to have them check the output and they said there was less than twelve volts and that...


you can take a screwdriver and place it near the center of the side opposite the pulley on your alternator, if it is charging it will be magnetic and pull the screwdriver to it. While car is running of course

Aug 22, 2011 | 1994 Lincoln Town Car

1 Answer

Going through alternators


Hi there, I am a girl (i.e. not car savvy), but I have a 1998 Altima as well, and the first time (4 months ago) I noticed the brake and battery lights on simultaneously, I took it to a Nissan service shop. Everything seemed fine until about a month ago when the symptoms returned. I ignored the problem for 3 days and the car just stopped running, period. Took it back to the shop, figured out it was a fauly alternator, got it sorted, no problem. Today (1 month after replacement), I see the same bloody problem, and I'm taking it back to the shop in the morning. I am wondering... is it the alternator, or something connected to the alternator that is malfunctioning? The 2 alternators put in were "rebuilt" since they didn't have genuine Nissan alternators available. I really hope the dealers aren't taking me for a merry ride.

Jul 13, 2010 | 1999 Nissan Altima

1 Answer

2000 olds intrigue. I had battery light come on, shortly followed by tach, speedo and other dash gages & lights going min to max, weak power windows, with any and all combinations of dashboard lights...


I think the diode block in the alternator is on it's way out. The output voltage from the alternator should be approximately 14 volts. When the alternator output is lower than the battery output, the car runs on the battery until it is depleted. That is why the car stops.

Very basically, it means that either the alternator output voltage is lower than the battery voltage, or the battery voltage is lower than the alternator output voltage. If the light gets dimmer as you rev up the engine, then you most likely have a problem with the alternator. If it gets brighter, then the battery is most likely bad. google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad);

Sep 19, 2009 | 2002 Oldsmobile Intrigue

1 Answer

When we first bought our 1995 Dodge Neon Sport from a friend we were aware that he had problems with the gages not always working correctly. The car has run well for almost a year and does not burn any oil...


I'm still not inclined to look past the area of the alternator. Check out the wiring going to the plug for the alternator for any signs of damage or broken insulation. Also, have an auto parts store test the alternator and while they are checking alternator output, move the wires around a litte and see if the output changes any. It sounds like a wiring problem to me. Hope this helps and good luck.

Jul 10, 2009 | 1995 Dodge Neon

1 Answer

Driving and suddenly all the dash gages, a/c, radio stop working


your alternator is defective......have it checked for current output when it's loaded...all accessories on....alternators should put out about 100 amps as an average but it also depends on the state of the battery......the battery actually powers the alternator for the alternator to recharge the battery, so if the battery is bad, it will load down the alternator and possibly damage the regulators inside it....if the alternator is bad then it might damage your new battery......one way to check is to start your car, then remove either the positive or negative cable from your battery...the car should continue to run.....hold the gas pedal down until your rpm is about 1500 and turn on your accessories....if the car dies at that rpm ...then the alternator is definately defective.....voltage output will show 14-15 volts but not enough current and current is whats required for things to work right.....good luck....., the reason for at least 1500 rpm is because alternators don't put out until a certain speed is reached so at 1500 rpm, it should be more than enough for the alternater to produce current.

check for bad or corroded or oxidized connection of all ground and positive cables of the charging system as well.......bad connections cause high resistance to current flow and severly limits current capacity.....loose connections do the same thing......it's a good idea to clean or replace these cables first then try the above.

silvio

Jun 27, 2009 | 2005 Dodge Caravan

4 Answers

2002 Kia Sedona new battery & alternator car dies while driving


SOUNDS LIKE U HAVE A DEFECTIVE ALTERNATOR.IT WAS CHARING WHEN IT LEFT THE SHOP SO THERE IS NO WIRING ISSUE.BAD ALTERNATOR

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2 Answers

Charge gage is reading 18 volts


need to have alternator output checked. sounds like the voltage regulator is going out. this is inside alternator.if it starts charging this high it can blow your bulbs and damage computers

Oct 03, 2008 | 2001 Dodge Durango

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