Jump-starting a Car.What I've learnt
Hi Guyz,Bharath here.
Yesterday,I was going with my Dad and saw a Micra getting jump started by a Polo.After some time,I could see smoke from Both Cars and I was frightened.Dad was laughing all the time and he explained me why this happened and what is the Correct way.I also started laughing
OK,I Will try to explain what I've learned in my poor english.
When you jump start a non-starting vehicle with another healthy vehicle and if you leave the engine of healthy vehicle running, you may end with a busted "donor" vehicle. Or both.
Why? First, because when the engine from donor is running it's alternator try to feed both batteries. Hence a great current is delivered from this alternator.
Second, when you try to start the non-starting vehicle a even higher current is asked from this alternator.
And when the action on the starter ends, this huge current try to maintains itself (coil effect) by increasing voltage. That's take some milliseconds but enough to hurt sensitive equipment.
Good practice should be:
-connect both positive batteries terminals.
-connect negative terminal from good battery to a bare metal part of the non starting engine.
-start donor vehicle for about 5 minutes, then switch OFF.
-try starting non starting vehicle. If it starts, let it running for 5 minutes or so then remove jumping cables. Begin by negative.
@ your own risks.
Thanks,Experts can correct me if I am Wrong.