Thursday, April 30, 2009

Is there a safe way to use my car to jump start anther car, without damaging the electronics or battery?

In these days of automated cars I have heard people say it is easy to damage the car providing the jump. I drive a 2007 Dodge Dakota

Is there a safe way to use my car to jump start anther car, without damaging the electronics or battery?
Yes. Check the owner manual for advice.
Reply:My brother was jumping his other car with a 97 dodge ram. Did not hurt his truck but with the extra amp going into the other car once it started it caused the security system in the other car to erase the codes in the key causing the car to no longer start would just turn over. So you have to be careful with newer cars.Some times its better to get a jump box or another battery to be safe.
Reply:I'd agree with Bobweb's link with one disagreement....jump starting a dead or mostly discharged battery puts a severe strain on the alternator...they are not meant to charge a dead battery, only to maintain one that is slightly discharged and provide power for the running operation of a car. I've always been taught to leave the two cars jumped together at high idle, with all accessories and lights turned off, for around 20 minutes to spread the charging load over two alternators rather than the one on the discharged car. It's best to use a regular portable battery charger of around 75 amps rating or higher but jumping in this manner will minimize possible damage to the alternator. As always, it's important to connect and disconnect jumper cables in the proper order to avoid voltage surges or shorts.
Reply:Hook up the red positive cables to both cars first, then the negative on the dead car, then the negative on the good car. Rev the motor to at least 2,500 rpm while cranking the dead vehicle. I'd pull the negative cable from the good car right away to protect it once the dead one is running.
Reply:No expert will stick their neck out and gaurantee that damage cannot occur no matter what procedure you follow in my opinion because that's the nature of transient electrical pulses which aren't completely predictable. Not only that, but different car manufacturers use different electrical and electronics that may be more or less vulnerable to electrical transients just like the electronics in your home during a thunder storm. Here's the best jump start online video procedure I have found to date and in an emergency that I'd use.





http://www.edmunds.com/ownership/howto/a...
Reply:My brother burned his ECU for jump start a dead car with ignition on. the dealer told that he could jump start another car but with the ignition OFF. So, it's safer to turn off your engine while boosting a dead car.
Reply:Connect positive to positive and negative to negative. Always connect the negative last and disconnect the negative first. Then you should be fine.


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