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Old 1st April 2016, 02:56   #151
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Default Re: How to Jump Start your car (dead battery)

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Originally Posted by S_U_N View Post
The other day, when testing the headlights in the workshop, my Zen's battery drained off.
So, the mechanic took another battery and just held it in his hand upside down and touched the positive to my dead battery's positive terminal (I am not sure if he also touched the negative).
And then he asked someone to crank the engine - and voila - it started.

How safe is this method?

Replying to a very old post but felt it is very necessary to reply to this one:

This is a very very unsafe method. It could result in injury and immediately spoil the booster battery.

1) If any of the six caps are not tightened properly, acid could fall out on the hands / engine / the battery you are trying to boost.

2) Even if the caps are tightened, the acid would come down and almost half of the battery plates (which are originally immersed in electrolyte during a normal upright position) would be exposed to air. Drawing a vehicle starting current (50-100 ampere) from such air-exposed plates will cause sulphate to build up immediately and damage the battery.

3) It is never recommended to use the booster and dead battery connected terminal for terminal. The risk of electrical problems in such a case is high. This is the reason we connect the negative of the booster to the chassis of the car being boosted.
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Old 1st April 2016, 09:35   #152
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Default Re: How to Jump Start your car (dead battery)

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Originally Posted by ankurbhageria View Post
Replying to a very old post but felt it is very necessary to reply to this one:

This is a very very unsafe method. It could result in injury and immediately spoil the booster battery.

1) If any of the six caps are not tightened properly, acid could fall out on the hands / engine / the battery you are trying to boost.

2) Even if the caps are tightened, the acid would come down and almost half of the battery plates (which are originally immersed in electrolyte during a normal upright position) would be exposed to air. Drawing a vehicle starting current (50-100 ampere) from such air-exposed plates will cause sulphate to build up immediately and damage the battery.

3) It is never recommended to use the booster and dead battery connected terminal for terminal. The risk of electrical problems in such a case is high. This is the reason we connect the negative of the booster to the chassis of the car being boosted.
Thanks. Some doubts
1. During boosting, both booster car & battery-dead car should have engine on with idling?
2. When the dead battery is able to be cranked, should we shut off engine of booster car?
3. In general what is the sequence of engine start & stop (both for dead-battery & booster car) during boosting and during disconnecting jumper cables.
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Old 6th October 2016, 15:10   #153
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Default Re: How to Jump Start your car (dead battery)

How to jump start a car with just a rope:



http://thegarage.jalopnik.com/how-to...ope-1787456976
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Old 7th October 2016, 21:27   #154
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Default Re: How to Jump Start your car (dead battery)

^^^
You'll most probably topple the car from the jack.

Regards
Sutripta
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Old 24th July 2017, 11:32   #155
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Default Re: How to Jump Start your car (dead battery)

Hi,
The mechanic foolishly connected another battery in opposite terminals in my innova ( battery was from an indigo).
The indicators flashed for a second and he removed the battery.

Thereafter I pushed started the innova and drove home and parked it.

The ABS light is on.
Headlights, horns and indicators work, but power windows, music systems wipers don't.

I need a new battery for sure.
Has he blown some fuses or much larger damage is done?
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Old 24th July 2017, 11:49   #156
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Default Re: How to Jump Start your car (dead battery)

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Originally Posted by vikramvicky1984 View Post
Hi,
The mechanic foolishly connected another battery in opposite terminals in my innova ( battery was from an indigo).
The indicators flashed for a second and he removed the battery.

Thereafter I pushed started the innova and drove home and parked it.

The ABS light is on.
Headlights, horns and indicators work, but power windows, music systems wipers don't.

I need a new battery for sure.
Has he blown some fuses or much larger damage is done?
Check the primary fuses in the Engine compartment first. If he has indeed managed to connect another battery in opposite, high chances that the fuses would have blown and then check for respective fuses (for Power Windows, Head Unit etc) in the Fuse Box inside the cabin.
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Old 24th July 2017, 12:13   #157
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Default Re: How to Jump Start your car (dead battery)

Quote:
Originally Posted by paragsachania View Post
Check the primary fuses in the Engine compartment first. If he has indeed managed to connect another battery in opposite, high chances that the fuses would have blown and then check for respective fuses (for Power Windows, Head Unit etc) in the Fuse Box inside the cabin.
Thanks a lot.
He indeed did that.
I am much worried about the ABS light.
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Old 24th July 2017, 12:23   #158
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Default Re: How to Jump Start your car (dead battery)

Any Reliable Places To Purchase Good Quality Jumper cables ?

looking for around 600Amp current rating.
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Old 24th July 2017, 12:23   #159
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Default Re: How to Jump Start your car (dead battery)

Quote:
Originally Posted by vikramvicky1984 View Post
I am much worried about the ABS light.
Before anyone tries to clear that ABS light by disconnecting the battery (if that works), better to visit your ASC and get it scanned for the reason behind this ABS light.

Also, check the ABS Fuse too. It could be a possibility that this also has blown and hence the warning light.

Last edited by paragsachania : 24th July 2017 at 12:28. Reason: Typo
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Old 27th July 2017, 11:55   #160
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Default Re: How to Jump Start your car (dead battery)

Quote:
Originally Posted by paragsachania View Post
Before anyone tries to clear that ABS light by disconnecting the battery (if that works), better to visit your ASC and get it scanned for the reason behind this ABS light.

Also, check the ABS Fuse too. It could be a possibility that this also has blown and hence the warning light.
Mechanic is saying there is damage to alternator.
Will get to know exact details once its opened up.
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Old 27th July 2017, 12:26   #161
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Default Re: How to Jump Start your car (dead battery)

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Originally Posted by vikramvicky1984 View Post
Mechanic is saying there is damage to alternator. Will get to know exact details once its opened up.
Don't blame the alternator right away. Generally connecting a battery without observing polarity can result in a blown main fuse among other things like damage to some electronic equipment and accessories.

This fuse is called the "Alt" fuse and is around 120A. It protects the circuit between the B+ (B=Battery) terminal of the alternator and the battery +ve terminal. Please ask him to check it.

It is located in the main fuse box under the bonnet/hood. Check the owners manual for details. Oh yes, removing this fuse is quite an exercise. It is a critical electrical part so please ensure you replace it with a genuine 120A (or whatever rating) fuse.
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Old 27th July 2017, 12:30   #162
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Default Re: How to Jump Start your car (dead battery)

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Originally Posted by R2D2 View Post
Don't blame the alternator right away. Generally connecting a battery without observing polarity can result in a blown main fuse among other things like damage to some electronic equipment and accessories.


Aternator is the last thing I would suspect to have gone kaput here with what was reported earlier.

All fuses must be checked including that Heavy Duty Alternator one and only then an attempt must be made to check the functioning of the Alternator by ascertaining if battery is charging when the engine is running.

Trying to "repair" the charging system should happen next.
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Old 27th July 2017, 13:24   #163
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Default Re: How to Jump Start your car (dead battery)

To add.. check your connecting cables to the fuse box & the battery. Loose connection would give an impression of a failing alternator on engine startup, but the cable was the culprit in my case.
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Old 27th July 2017, 13:35   #164
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Default Re: How to Jump Start your car (dead battery)

Quote:
Originally Posted by ankurbhageria View Post
3) It is never recommended to use the booster and dead battery connected terminal for terminal. The risk of electrical problems in such a case is high. This is the reason we connect the negative of the booster to the chassis of the car being boosted.
The negative lead is connected to a bare metal grounding point/chassis to keep it as much away from the negative lead of the dead battery.

If the lead is directly connected to the negative terminal of the dead battery, there is a high risk of sparking which could potentially explosively ignite the Hydrogen gas accumulated in the dead battery causing serious injury.


Quote:
Originally Posted by NOTORIOUS View Post
Any Reliable Places To Purchase Good Quality Jumper cables ?
looking for around 600Amp current rating.
Unfortunately, almost all the ready-made jumper cables marketed online and in local shops are made of thin copper (or whatever) wires surrounded by thick rubber insulation (to make the cables appear thick and heavy duty). They are no where close to supporting the Amperage rating needed to carry all that high current required for jumpstarts.

The best (and reliable) thing to do is purchase the heavy duty copper cables of the required length (like Finolex rated for 600 Amp) and buy the jumpers clips and join them to make the jumper cables. The longer the cable, the thicker the copper wire needed.

Last edited by for_cars1 : 27th July 2017 at 13:50.
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Old 29th July 2017, 10:51   #165
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Default Re: How to Jump Start your car (dead battery)

Quote:
Originally Posted by R2D2 View Post
Don't blame the alternator right away. Generally connecting a battery without observing polarity can result in a blown main fuse among other things like damage to some electronic equipment and accessories.

This fuse is called the "Alt" fuse and is around 120A. It protects the circuit between the B+ (B=Battery) terminal of the alternator and the battery +ve terminal. Please ask him to check it.

It is located in the main fuse box under the bonnet/hood. Check the owners manual for details. Oh yes, removing this fuse is quite an exercise. It is a critical electrical part so please ensure you replace it with a genuine 120A (or whatever rating) fuse.
Quote:
Originally Posted by paragsachania View Post


Aternator is the last thing I would suspect to have gone kaput here with what was reported earlier.

All fuses must be checked including that Heavy Duty Alternator one and only then an attempt must be made to check the functioning of the Alternator by ascertaining if battery is charging when the engine is running.

Trying to "repair" the charging system should happen next.
Thanks a lot. You were correct.
Driver and mechanic had taken for a ride. Had claimed to replace alternator cutout n billed 3k. The abs light was fine but stereo and remote locking wasn't working.
I checked and found out they had put a wire to bypass tha fuse box and the 100a amp fuse was indeed blown.
After removing the wire, car is back to the same state as earlier.

Have parked it in closed garage. Will send it to asc when time permits.

Whole thing was my mistake, firstly don't trust a roadside mechanic to jumpstart ( which created the whole problem). Don't trust a new driver who we often felt pilferaged fuel.
Hadbadi mein bahut gadbadi ho gaya

Last edited by vikramvicky1984 : 29th July 2017 at 11:06.
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