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2000 Pontiac Sunfire new battery new alternator wont charge

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  • Pontiac Master
  • 11,492 Answers

About the only thing you'll be able to check is for battery voltage at the heavier gage wire on the back of the alternator ! If there is no voltage there you have a burnt fusible link ! The other two wires at the connector come from the engine computer ! Is the charge light lit on the dash ?

Posted on Apr 18, 2015

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Posted on Jan 02, 2017

  • 12 Answers

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Posted on Oct 12, 2008

SOURCE: 2000 Ford Ranger Alternator

have the alt tested there not very good do you have 12 volts going to the big wire on the alt and with key on you should have it to a small wire going to the regulator to turn it on

Posted on Dec 10, 2008

  • 6982 Answers

SOURCE: 2000 Pontiac Sunfire wont start

Its likely that you have either a bad ignition switch or a bad neutral safety switch (if stickshift, clutch switch) Try starting in neutral...if it starts, change neutral switch (jump across clutch switch, check starting in neutral with your foot on the brake) Ignition switch is on top of steering column under dash.

Posted on Mar 19, 2009

  • 7353 Answers

SOURCE: charge light going out but not charging battery.

what is the voltage of the battery when running, voltage when turned off, voltage after headlights are on for 10 minutes. is the battery good? how do you know. these take a sealed gell cell battery.

Posted on Sep 18, 2009

  • 1146 Answers

SOURCE: Were is the thermostat located in a Pontiac Sunfire 2000?

Your thermostat is located under the thermostat housing, which is what the upper radiator hose clamps to on the top of your engine. Basically, you need to start with a cold engine, drain your radiator, then unclamp the upper radiator hose from the engine. Remove the bolts from the thermostat housing, and gently tap on it to remove it. clean up the mounting surfaces on both the engine and the housing, and install a new thermostat, and new gasket. tighten to proper torque, reconnect the radiator hose, then refill up the radiator and cooling system.

Posted on Nov 24, 2009

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Need information on 2000 Pontiac Sunfire charging system

To check the alternator on GM's. Start the car, pull the negative post off the battery. If the car dies, the alternator is bad. If it stays running. Check and/or replace the battery. Also check and clean or replace badly corroded wires from the battery.

Apr 19, 2015 | 2000 Pontiac Sunfire

1 Answer

New battery and new alternator on a 1998 pontiac Sunfire the battery won't stay charged

Have you checked alternator output on the car, and will the battery stay up if you disconnect the cables overnight ?

Mar 05, 2014 | 1998 Pontiac Sunfire

1 Answer

My 200 pontiac sunfire died and lost power on the freeway yesterday and refuses to start again makes a click sound and nothing

Possibly a loose or corroded connection somewhere, or bad alternator, not charging battery and caused system failure. Check for good clean connections at battery and starter. With a volt meter a battery should read 12.4 - 12.6 at rest, if you have a functioning alternator battery should read up to 13.5 to 14.5V .

Jan 12, 2014 | 2000 Pontiac Sunfire

2 Answers

2000 Pontiac Sunfire won't start

Try checking the oil, the low oil sensor will disable the ignition

May 29, 2017 | 2000 Pontiac Sunfire

1 Answer


check alternator, not holding charge,also change belt and belt tenisoner.this may be causing battery to fail. I had same problem on my car.

Nov 24, 2011 | 2005 Pontiac Sunfire

1 Answer

Battery light is on.wont hold a charge.starts after hooking up battery charger.thanks

If battery light is on while engine is running, then the charging system is bad. That is, you will need a new alternator. If the battery is a couple years old, you may have now stressed it a lot also. Expect it to show signs of failure too, quite soon if not already. First thing is to change out the alternator. Put the battery on charge for a while too. Then after new alternator, see if you have weak starting problems over next week or so.

May 01, 2011 | 1998 Pontiac Sunfire

2 Answers

I have a 2000 sunfire, since its been cold out ive had to have my car jumped 5 times for it to start. is there anything i can do to prevent this from happening anymore?

Sounds like your Battery is not fully charging...(magnified in cold weather:) If your sunfire turns over slowly the next time you are trying to start after you have jumped it again...your battery is most likely the problem...While your car is running, you can drive to your local Auto Parts store...(Auto Zone) for a free battery test...Other items to check would be clean battery post connections on your sunfire...the alternator might not be fully charging your battery, but doesn't sound like your problem...Have your battery checked so will not be stranded with this problem...:)

Dec 13, 2010 | 2000 Pontiac Sunfire

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