Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 
22255 posts

Uber Geek
+1 received by user: 4781

Trusted
Subscriber

  # 658694 19-Jul-2012 21:09
Send private message

Connecting and disconnecting with the donor car running is what causes problems. Load dumping when you remove the flat battery causes a spike from the alternator.

Lost a headlamp jumping someone with the donor car (mine) running.




Richard rich.ms

2239 posts

Uber Geek
+1 received by user: 447

Trusted

  # 658702 19-Jul-2012 21:15
Send private message

richms: Connecting and disconnecting with the donor car running is what causes problems. Load dumping when you remove the flat battery causes a spike from the alternator.

Lost a headlamp jumping someone with the donor car (mine) running.


So we should stop the donor car, then disconnect the jumper leads?

 
 
 
 


152 posts

Master Geek
+1 received by user: 2


  # 658705 19-Jul-2012 21:18
Send private message

I've read in multiple places that by connecting -ve to -ve there is a small risk of doing major electrical damage to the car if a short occurs?  Anyone agree with this?

22255 posts

Uber Geek
+1 received by user: 4781

Trusted
Subscriber

  # 658707 19-Jul-2012 21:27
Send private message

Not heard of that. There is a risk of putting the -ve onto an unsuitable part of the car when the starting current goes thru it. Good luck finding the block under all the plastic covers on modern cars.




Richard rich.ms

1080 posts

Uber Geek
+1 received by user: 31


  # 658866 20-Jul-2012 08:36
Send private message

My advice:

STOP the donor car BEFORE starting the recipient car. Otherwise you risk damaging the alternator in the donor car. Let the battery deliver the 400A+ starting current, not the alternator.

I had to replace the diode assembly in my alternator after starting another car (with my car running).

19282 posts

Uber Geek
+1 received by user: 2600
Inactive user


  # 658870 20-Jul-2012 08:40
Send private message

Skolink: My advice:

STOP the donor car BEFORE starting the recipient car. Otherwise you risk damaging the alternator in the donor car. Let the battery deliver the 400A+ starting current, not the alternator.

I had to replace the diode assembly in my alternator after starting another car (with my car running).


Never heard of this before I would not stop the donor car

If possible rev donor car up to about 1500 rpm

5473 posts

Uber Geek
+1 received by user: 1914


  # 658878 20-Jul-2012 08:45
Send private message

You could try reading the manual for the car ;-)

In all seriousness, most modern (and not so modern) car owner's manuals give some instruction on jump starting for that specific model. With the engine and battery often hidden from view, some are providing terminals specifically for jump starting (like the current commodores).

 
 
 
 


1080 posts

Uber Geek
+1 received by user: 31


  # 658884 20-Jul-2012 09:06
Send private message

RunningMan: You could try reading the manual for the car ;-)

In all seriousness, most modern (and not so modern) car owner's manuals give some instruction on jump starting for that specific model. With the engine and battery often hidden from view, some are providing terminals specifically for jump starting (like the current commodores).


The manual for my car which I read only when repairing it, said to stop the donor car before starting the recipient car. It was a 1995 Nissan Bluebird.

169 posts

Master Geek
+1 received by user: 34


  # 658886 20-Jul-2012 09:12
Send private message

grasshoper: I've read in multiple places that by connecting -ve to -ve there is a small risk of doing major electrical damage to the car if a short occurs?  Anyone agree with this?


The only situation that I am aware of where this could happen is if one vehicle is +ve earth and the other vehicle is -ve earth. If you connect the jumper leads and the vehicles are already connected to one another (say a door open and touching the other car) you will get a wicked short. Can't think of any other way the above would occur. Of course, not many positive earth cars anymore.

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

New Zealand government unveils new digital service to make business easier
Posted 16-Jul-2019 17:35


Scientists unveil image of quantum entanglement
Posted 13-Jul-2019 06:00


Hackers to be challenged at University of Waikato
Posted 12-Jul-2019 21:34


OPPO Reno Z now available in New Zealand
Posted 12-Jul-2019 21:28


Sony introduces WF-1000XM3 wireless headphones with noise cancellation
Posted 8-Jul-2019 16:56


Xero announces new smarter tools, push into the North American market
Posted 19-Jun-2019 17:20


New report by Unisys shows New Zealanders want action by social platform companies and police to monitor social media sites
Posted 19-Jun-2019 17:09


ASB adds Google Pay option to contactless payments
Posted 19-Jun-2019 17:05


New Zealand PC Market declines on the back of high channel inventory, IDC reports
Posted 18-Jun-2019 17:35


Air New Zealand uses drones to inspect aircraft
Posted 17-Jun-2019 15:39


TCL Electronics launches its first-ever 8K TV
Posted 17-Jun-2019 15:18


E-scooter share scheme launches in Wellington
Posted 17-Jun-2019 12:34


Anyone can broadcast with Kordia Pop Up TV
Posted 13-Jun-2019 10:51


Volvo and Uber present production vehicle ready for self-driving
Posted 13-Jun-2019 10:47


100,000 customers connected to fibre broadband network through Enable
Posted 13-Jun-2019 10:35



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.