Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 1st April 2016, 02:56   #151
BHPian
 
Join Date: May 2015
Location: Faridabad
Posts: 37
Thanked: 13 Times
Default Re: How to Jump Start your car (dead battery)

Quote:
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.
ankurbhageria is offline   (2) Thanks Reply With Quote
Old 1st April 2016, 09:35   #152
BHPian
 
ankan.m.blr's Avatar
 
Join Date: Dec 2011
Location: Bangalore
Posts: 577
Thanked: 477 Times
Default Re: How to Jump Start your car (dead battery)

Quote:
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.
ankan.m.blr is offline   Reply With Quote
Old 6th October 2016, 15:10   #153
Distinguished - BHPian
 
smartcat's Avatar
 
Join Date: Jun 2007
Location: Bangalore
Posts: 2,678
Thanked: 9,479 Times
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
smartcat is offline   Reply With Quote
Old 7th October 2016, 21:27   #154
Distinguished - BHPian
 
Join Date: Jul 2009
Location: Kolkata
Posts: 3,423
Thanked: 1,910 Times
Default Re: How to Jump Start your car (dead battery)

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

Regards
Sutripta
Sutripta is offline   (1) Thanks Reply With Quote
Old 24th July 2017, 11:32   #155
BHPian
 
Join Date: Oct 2008
Location: Mumbai/Jamshedp
Posts: 317
Thanked: 143 Times
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?
vikramvicky1984 is online now   Reply With Quote
Old 24th July 2017, 11:49   #156
Distinguished - BHPian
 
Join Date: Nov 2007
Location: Belur/Bangalore
Posts: 3,892
Thanked: 9,090 Times
Default Re: How to Jump Start your car (dead battery)

Quote:
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.
paragsachania is online now   (1) Thanks Reply With Quote
Old 24th July 2017, 12:13   #157
BHPian
 
Join Date: Oct 2008
Location: Mumbai/Jamshedp
Posts: 317
Thanked: 143 Times
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.
vikramvicky1984 is online now   Reply With Quote
Old 24th July 2017, 12:23   #158
BHPian
 
NOTORIOUS's Avatar
 
Join Date: Mar 2007
Location: Delhi
Posts: 783
Thanked: 86 Times
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.
NOTORIOUS is offline   Reply With Quote
Old 24th July 2017, 12:23   #159
Distinguished - BHPian
 
Join Date: Nov 2007
Location: Belur/Bangalore
Posts: 3,892
Thanked: 9,090 Times
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
paragsachania is online now   (1) Thanks Reply With Quote
Old 27th July 2017, 11:55   #160
BHPian
 
Join Date: Oct 2008
Location: Mumbai/Jamshedp
Posts: 317
Thanked: 143 Times
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.
vikramvicky1984 is online now   Reply With Quote
Old 27th July 2017, 12:26   #161
Senior - BHPian
 
R2D2's Avatar
 
Join Date: Oct 2008
Location: Punya Nagari
Posts: 1,649
Thanked: 763 Times
Default Re: How to Jump Start your car (dead battery)

Quote:
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.
R2D2 is offline   (2) Thanks Reply With Quote
Old 27th July 2017, 12:30   #162
Distinguished - BHPian
 
Join Date: Nov 2007
Location: Belur/Bangalore
Posts: 3,892
Thanked: 9,090 Times
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.


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.
paragsachania is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Portable Jump-Start Packs rameshspassion Technical Stuff 6 4th January 2015 11:54
DIY : Renew Your dead car / bike battery Hashim DIY - Do it yourself 40 20th May 2013 11:30
Indigo --battery light which stays on when start and RPM meter is dead virender Technical Stuff 11 17th July 2012 11:17
Indigo --battery Light on when start and RPM meter is dead virender Technical Stuff 1 12th April 2009 14:10
Start battery dead cars without jumper cables using static electricity revvedup Technical Stuff 23 25th February 2007 00:13


All times are GMT +5.5. The time now is 12:32.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks