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General Chat Thread, Jumpstart a car with a 308 in General; An odd question really. I've jump started a couple of cars in my life time with no issues. The wife's ...
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    Jumpstart a car with a 308

    An odd question really. I've jump started a couple of cars in my life time with no issues. The wife's 206 battery is flat since the cold spell and I've cracked out the jump leads. The problem is on my 308. the battery has a visible red + terminal, but no sign at all of the black - connector so I'm at a loss as where to connect the black lead to! Any ideas?

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    is it just under some silly plastic cover?

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    Quote Originally Posted by sted View Post
    is it just under some silly plastic cover?
    I did think that at first as the red + terminal is under a little plastic "lid" however I have scoured the case and there is no other hidden compartment!

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    SYNACK's Avatar
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    Re: Jumpstart a car with a 308

    The terminals are different sizes and it should be written on the battery, just check the one that does have markings and you should be able to tell.

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    a 208 and a 308 Ferrari , Nice


    There must be a negative, hidden under a cover. Alternativly use a good clean metal part of the engine like the mounts.

    TT

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    When I read the title, I pictured you jumpstarting a car using one of these
    Jumpstart a car with a 308-308mag.jpg

  8. 2 Thanks to Chris_Jones:

    Garacesh (22nd January 2013), Rawns (22nd January 2013)

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    Re: Jumpstart a car with a 308

    Oops, re-read. You should not be connecting the jump leads to the negative on the battery but rather a metal point on the chassis like the engine block. Otherwise you are in danger of cooking the ECU even with surge protected leads.

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    Rawns (22nd January 2013)

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    mac_shinobi's Avatar
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    So if you have a car that has both terminals ( positive and negative ) is it still bad to connect the negative jump lead to the negative terminal on the car that has the flat battery ?

    How are you supposed to connect the jumper cable ( both positive and negative leads ) between both cars when jump starting ?

    Working car --> Both positive and negative connected to positive and negative on battery --> non working car ( flat battery ) --> positive lead to battery and negative lead to engine block ?

    If not then how exactly ?

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    Quote Originally Posted by mac_shinobi View Post
    So if you have a car that has both terminals ( positive and negative ) is it still bad to connect the negative jump lead to the negative terminal on the car that has the flat battery ?

    How are you supposed to connect the jumper cable ( both positive and negative leads ) between both cars when jump starting ?

    Working car --> Both positive and negative connected to positive and negative on battery --> non working car ( flat battery ) --> positive lead to battery and negative lead to engine block ?

    If not then how exactly ?
    My situation is the other way. 206 with flat battery (both + and - terminals) - 308 with working battery (+ terminal and presumably - on engine block). So I would assume connecting the 206 - terminal to my 308 engine block will still allow me to successfully jump the 206 into life?

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    Quote Originally Posted by mac_shinobi View Post
    So if you have a car that has both terminals ( positive and negative ) is it still bad to connect the negative jump lead to the negative terminal on the car that has the flat battery ?
    ive heard this before that ecus dont like this being done which is one of the reasons you can get trickle charge starters that plug into the fag lighter socket.

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    mac_shinobi's Avatar
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    My first post is probably side stepping a bit as was just asking generally how you are supposed to jump start a car with a duff / dead battery ?

    Not come across or heard of it being bad for the ECU to connect the jumper leads between both batteries ie positive red cable going between both positive terminals on both batteries and the same for the negative but obviously between the negative terminals on both batteries.

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  16. 2 Thanks to andyrite:

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    Re: Jumpstart a car with a 308

    Have donor car running and connect engine block to engine block with negative then connect positive to donor positive terminal then to dead positive terminal. Leave donor running for a little bit to get a little charge in the dead battery so it does not act as a current drain during starting and cause itself more damage by trying to draw out whatever little current may be left causing more such Sulphation of the terminals.

    Keep donor running while starting dead car.

    ... Profit :-)

    Edit, red to red first apparently from above but I'd do the rest as I describe, has worked for me many times when jumping tens of late model cars for staff.
    Last edited by SYNACK; 22nd January 2013 at 09:37 AM.

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    Been doing it slightly wrong for a while then ( have always connected both batteries together so negative terminal to negative terminal and positive terminal to positive terminal )

    How come you connect negative on working battery / car to metal ie bolt / engine block on non working car ?

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