Question about 2001 Dodge Dakota

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Code p1682 need to know if the alt is bad

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  • Phil Goncalves May 11, 2010

    Hi there.... what symptoms are you having with your Dakota? do you have to jump the battery when you start it or can you start the vehicle without a jump?

  • williamwade3
    williamwade3 Jan 12, 2013

    have to jump the batter some time

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  • 5,158 Answers

Quick test... start the vehicle and unhook the battery. if it quits... alternator... if it keeps running battery...
judging from your question you are already aware of this but that code is
P1682 Charging System Voltage Too Low (Chrysler, Jeep)

Posted on Jan 03, 2009

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02 Camry charging circuity


great questions...!!!
no it cant, mine can.
most dmm do 20 amps
most cars do 100 to 500 amps. cranked.
the alt can do 50, some more.
yes, its all DC, and the best tool is a DC amp clamp meter for $50
the alt is AC inside, and DC outside, thus the name.
why jnot say context what are you doing.
i need to know your plans.
dead battery ever 5 hours.
car wont start
battery explodes.
wires melt.
what?

testing the ALT on car , takes some skills
alts. can in fact shut down even when 100% OK (it's loansome)

most folks never read the spec on the VR.
its can be very complex this.

cases in point.
open ground or big wire.
battery going open inside. (cracks in battery or a cell dries up)
over volage (over 16v)
battery shorts. or cables shorts.
cable opens or ground opens/
some newer cars the ECU is the VR. ! !!!!
older cars the charge lamp out , nets you no, start up exciton field current (born dead ALT)

to do this we must know what alt we have.
the FSM covers that as does ALLDATA.com

so here are the 1st test.
12.6v at battery means charged (resetted and not freezing)
13.3- 15v running means the ALT is working
i stall engine
and leave head lights on for 2 mins. or so.. battery was discharged.
so i start up with my amp clamp (DC) clamped on to the
ALT big signal wire, it shows me 40amps.
good.
if not bad.
as i watch it ,it can drift to zero (or to 5amps ignition power)
note polarity , - is drain + is charging.
depends on clamp orientation, that is why i use discharge test first.
+40amps?

need more ask.

Dec 27, 2013 | Toyota Camry Cars & Trucks

1 Answer

Alternator in my 4 cyl Hyundai Sonata has new alternator and when put back on alterator check is still says it's bad, could it be relay?


try this! start vehicle, while it is running remove the negative cable from battery. if it stays running the alternator is good. make sure battery connections are clean and tight. if checking alternator at battery, and you know its charging. then it has to be a short in wire from the alt. if the engine dies when testing as above. its either a bad alt, or a bad wire. or bad ground. good-day!

Dec 09, 2012 | Cars & Trucks

1 Answer

1994 E150 van ford no alt power have changed the alt. charged the batt


There is a fuse or fuseable link between the alt and battery, and the alt gets a signal from the key to activate the voltage regulator.
I would check for batt voltage at the alternator and you may need a wiring diagram to check for key voltage.

Jul 02, 2012 | Ford Cars & Trucks

1 Answer

How do you know if a 2005 dodge neons alternator is still good?


put a volt meter on the battery at idle it should read approx 13.5 volts. if it does not the alt is not charging the battery. That does not mean for sure that its bad, connections and battery power to the alt wil need to be verified. Is the battery light on, if so, the alt isnt charging.

Apr 22, 2010 | 2005 Dodge Neon

2 Answers

Change the alternator


First, take several pictures of the serpentine belt arangement so you know how that goes back together.
Here are the steps I recommend :
- 1 ) Remove negative cable (black) from the battery.
- 2 ) Loosen the serpentine belt by pulling back the belt tensioner( you may need a special tool)
- 3 ) Remove the connector plug and( red) hot wire.
- 4 ) Pull the bolts out holding alt on bracket.
- 5 ) Pull out alt.
How do you know that the alt is bad ? A auto parts center can check it for you.
What are you replacing it with, new or used.
Please let me know how it goes.

Feb 07, 2010 | 1996 Dodge Caravan

1 Answer

My alternator went out, or so I thought. I replaced it and the system still won't charge. I just replaced the battery and I know it is good. What could the problem be?


battery cables corrosion or lose. Also could be lose nut on alternator where large wire is. Clean and tighten all wire ends + - and alt. that don't work get an dc multi meter and check voltage on alt at nut when running should be like 13 to 14.5 volts black to batt ground and red to alt on multi meter. if it's not 13-15 your alt. is bad. Get your batt load tested free at autozone.

Nov 27, 2009 | 1999 Ford Expedition

1 Answer

Low voltage out of replaced alternator


Possible to have bought a bad alternator.... Try another one..Take advantage of the warranty the bad one came with....But have them check the voltage output on the new one so you KNOW for sure....Also consider issues with your voltage regulator and the possibility of needing a replacement. They are relatively inexpensive so that is the good news....More serious issue that could be addressed is a short somewhere in the harness. I would recommend a full electrical diagnostic to make sure there is not a bad ground....If you'd rather not spend a lot, just check all the wires you can visually.....But keep in mind that the voltage regulator is key and you do not want to spike the computer with inconsistent power levels and surges.

May 13, 2009 | 1999 Mercury Sable

1 Answer

Hyundai Grandeur XG 3000 Alternator charges intermittently


you can bench test it but u need to have something to turn the alt up to speed but thats not needed check your voltage make sure its between 13.00 to 14.85 anything under that then the alt is not charging anything over that then the reg is bad and if the reg is bad then just replace the alt the cost of a reg is more then the alt brushes can be found at any repair shop for starters and alt let me knoe how it goes

Dec 07, 2008 | 2001 Hyundai XG300

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