[Shop-talk] Jump starting a late model car

[Mike Rambour]

   I have been told you should not jump start newer cars as well, I have 
one of those jump toys but never used it yet.
   This is straight from FORD for the 2023 F-150

https://www.ford.com/support/vehicle/f150/2023/how-to-videos/video-library/more-vehicle-topics/6319506656112?name=f-150-jump-starting

   So Ford is saying its ok to jump start but don't connect the negative 
of the dead battery car to the negative terminal, instead to a 
ground.    I damaged my F-150 battery by having a battery charger on it, 
apparently Ford says you can't do that without removing that little 
black box on one of the terminals (forget which one now and too lazy to 
walk outside and check).  When I changed my battery, I had to do the new 
battery reset with the ODBC scanner, if you don't reset, the car will 
not know there is a new battery and possibly overcharge the new 
battery...that is what the stealership says anyway.

     mike

On 11/30/23 2:12 PM, JohnT Blair wrote:
> I come to the well of knowledge looking for information.
> My sister just emailed me about her having a friend jump start her 
> late model Lexis from his F150 pickup.  He got her started and then 
> drove his truck to someplace and parked it.  When he tried to start 
> it, it wouldn't start.  He had it towed to a dealership and they said 
> his battery was fried.
> In my sister's email she said that she has found out that you 
> shouldn't jump start a car made from 2000 on.
> My question is why and how do you start a car with a dead battery?
> I realize that the jumping car should be running, so that gives the 
> possiblity of too much current being drawn from the jumping car as 
> it's got a good battery and an alternator capable of putting out well 
> over 100A!  So the jumped car's dead battery looks like a short 
> circuit.  Bad - lots of current!
> So disconnecting the dead battery and putting it on a battery charger 
> to give it a more controlled charge should be OK.
> But that's not easy to do in a parking lot.
> What about these jump boxes, especially the little ones like
>
> https://www.walmart.com/ip/NEXPOW-Battery-Jump-Starter-1500A-Peak-12800mAh-Car-Starter-up-7-0L-Gas-5-5L-Diesel-Engine-12V-Portable-Booster-Power-Bank-Box-LED-Light/534414164?adsRedirect=true
>
> But that is supposedly capable of 1500A!!!
>
> I did a google search on the subject and found an article talking 
> about all the problems that you can have doing this.  But the article 
> really didn't say if these problems were to the jumping or the jumped 
> car or both.
>
> So what is the collective knowledge about this?  What am I missing?
>
> JohnT,
>
>
> John T. Blair  WA4OHZ     email: jblair1948 at cox.net
>
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