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How to charge a battery?

Can the battery be hooked up to the charger without disconnecting the battery cables from the car?

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  • Subaru Master
  • 3,679 Answers

No , other wise the 'charge ' will go through the vehicle's electrical system as well , best to remove battery completely unless you have a big enough garage or similar , but you must disconnect the battrey leads and trickle charge for 214 hrs

Posted on Nov 10, 2014

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Posted on Jan 02, 2017

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SOURCE: starter location and tools needed to replace

It is located under the car toward the front of the motor by the oil filter. Look for a metal cylinder like object with a big 4 gauge wire going to it. To change the starter you will need to disconnect the battery. Using a 15mm socket and entension remove the 2 starter bolts. You may have to remove the oil filter to get enough clearance to get the starter out. Some cars have a 13 or 15mm bolt on the back of the starter for extra support. If your's has this you will need to remove it.once you pull the start down remove the 8mm and 13mm bolts that connect the wires to the starter. Be careful not to let the starter hang from the wires as they will break. Install the new one in reverse.

Posted on Nov 07, 2008

  • 153 Answers

SOURCE: Can I charge Intrepid battery from the jump start posts?

You should be able to do this with no problem.

Posted on Nov 08, 2008

  • 36 Answers

SOURCE: Batteries won't charge while wired to truck

Hi, seems that your alternator diodes are faulty.
You can check this by disconnecting the radio & switching off all interior lights etc.
Then remove one battery lead.
Then get an amp meter and connect it between the battery & the removed lead.
If you get a reading the alternator is drawing current , hence faulty diodes.
The alternator will still charge the battery when the engine is going but then discharges when stopped.
Also check your batteries with a hydrometer by checking the battery acid in each cell as you could have a dodgey cell in them.

Posted on Nov 28, 2008

  • 22095 Answers

SOURCE: Car wouldn't start, tried to charge the battery,

it has a seperate alarm ,get the side cutters out and remove it .

Posted on Nov 22, 2009

  • 1702 Answers

SOURCE: Is it O.K. to connect a battery charger up to the

yes, you can charge the battery wile it is connected just make sure that you donot hook the charger leads up backwards.

Posted on Nov 11, 2010

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Trying to charge battery for first time. It says connect two red connectors. Do you charge it first then connect the connector afterwards?

1. I assume this is a car battery so the first thing you do is to disconnect the vehicle cables from the battery terminals. The negative first and then the positive. The positive terminal is marked with a plus sign ...+ ... When refitting the cables to the
battery after it is charged you fit the positive cable to the positive battery terminal(+) first and fit the negative(-) last.

2. Now that the battery is unconnected from the vehicle you can fit the charging cables to the battery terminals. The charger you have should have 2 cables leading from it , a positive with a red plastic insulation on the clip and a negative cable probably with black insulation on the clip.The instructions with the charger will tell you in which order the cables are to be attached to the battery and the order you remove them. Each of the 2 cables has to be clipped onto the correct battery terminal. The positive cable(+) from the charger goes to the positive battery terminal (+)and the negative cable(-) from the charger goes to the negative battery terminal(-).

3. Once the cables from the charger are properly connected to the battery, you can plug in the charger and turn on the power.

4. Batteries generate explosive gasses when being charged and it only takes one small spark to ignite them. Don't reconnect the battery after charging for a half hour or so and make sure the area where you are charging is well ventilated.

Dec 18, 2015 | Cars & Trucks

1 Answer

Is the charger to be "on" while charging it; then on while hooked to battery?

The portable charger should NOTE be connected to a battery while the battery is connected to a vehicle! Charge the battery off the car, then disconnect the charger and put the battery into the vehicle to start it! If the charger is not working check the fuse! If that is ok then probably damaged the circuitry!

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How do you hook up amp meter for battery charger

DO NOT CONNECT IT to both poles + - !!! the amp meter have very small internal Ressistance, it blows of :) Connect it like in the picture d640b1d6-15c8-40ff-9dc1-eac0eb3b2a1f.png

Apr 16, 2014 | Cars & Trucks

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How do I charge my battery on a 2000 boxster porsche

The battery is located in the front trunk of the car, under a cover just below the middle of the windshield. Either remove the battery or disconnect the positive (Red) cable and hook up a battery charger. You can get a battery charger at sears or any auto-parts store. Get one that automatically stops when the battery is fully charged. If you have to charge it after each trip it could be that the battery needs to be replaced or that you need a new alternator.

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2005 Corvette stored in garage with no battery tender hooked up, now battery is dead. How do i gain access in the car to release the hood to hook up a charger?

Usually you can energize the electrical system by making a mini set of jumper cables using a lamp cord and alligator clips. attach one end to a battery and attach the ground to the starter housing or any metal bracket, the positive lead to the main terminal on the starter. (don't mix up the lead ends...mark them so you can identify them.) Do not try to start the car with this attached. light wire won't handle the amperage.

Feb 03, 2011 | 2005 Chevrolet Corvette

1 Answer

Tried jumpering a dead battery with a battery charger. the truck tried to start without me turning on the key. disconnected power, pulled the battery and charged. when the battery was charged and put back...

check that you do not have signal to s terminal on the starter, disconnect it and try hooking battery if starter turns there is an internal short in the starter,

Nov 22, 2009 | 1990 Chevrolet K1500

1 Answer

Can I charge the battery for 2006 Buick Rendezvous, without removing it from the car, and if so, how?

By disconnection one of the battery wires...if it is a side post, you will need to go to your auto parts store and get a post that screws in so you can attach the charger cable...the reason that you don't charge with everything hooked up is because you can get a surge and damage the components in the computers.

Oct 29, 2009 | 2006 Buick Rendezvous

1 Answer

Dead battery...was told to keep power to the engine when changing battery or it would cause problems to the gauges, etc. Is this true?

If your hooking up a battery charger you can attach it to your battery without removing anything. I would not have your engine running while your charging it cause that doesn't make sense to be using your battery and charging it at the same time. You can also remove the battery from the car if you wish to isolate the battery. be sure to remove to negative cable first otherwise you could cause a short and that could lead to all kinds of problems. Not really sure where your friends got there info but your engine already doesn't have power cause your battery is dead. your best bet is to remove the battery and charge it, then test it, then hook it back up. When you hook it back up be sure to attach the negative cable last.

Jul 09, 2009 | 2001 Toyota 4Runner

1 Answer

Charging a battery on a 2001 Caddy sts

when charging a battery it is better that it is disconnected from the car's battery cables and even better if removed, also don't charge it if you smell a rotten egg odor, the cell(s) may be shorted and it could explode. remember red to positive, black to negative, hook the positive up first. don't overcharge the battery, 2 or 3 hours at 4-6 amps is enough charge to have it tested, if it won't charge then the battery is defective and needs to be replaced.

Mar 28, 2009 | 2001 Cadillac Sts

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