Is it cos its a landy?

[Sir DD of Cumbria]

Right pop quiz,

Why would my Disco 200tdi,its battery indicating 12.6v on an altimeter, whilst being jumped by a strong battery, not start. In fact not even light the dash lights?

 

[Chrisfrain2007]

Bad connection somewhere

 

[Matt TDi]

Terminals the wrong way?

Dodgy ignition switch?

Short circuit?

Going blind?

 

[martin1512]

First of all, why on earth are you using an altimeter? surely your battery is not that high off the ground Did you say you measured your battery whilst connected to another one? If so, you may have got a higher reading than the battery is actually putting out, failing that, I would suspect a loose battery terminal or a loose/broken wire somewhere.

 

[Sir DD of Cumbria]

Terminals the wrong way? Nope

Dodgy ignition switch? Not sure yet

Short circuit? Not sure yet

Going blind? :lol:

Thanks for the suggestions

 

[Sir DD of Cumbria]

First of all, why on earth are you using an altimeter? surely your battery is not that high off the ground Did you say you measured your battery whilst connected to another one? If so, you may have got a higher reading than the battery is actually putting out, failing that, I would suspect a loose battery terminal or a loose/broken wire somewhere.

I use an Altimeter because I cant spell!

I didnt measure the battery whilst hooked up to the jump leads

And Battery terminals are tight

 

[The V8 man]

Sounds like a bad earth to me

 

[theorangebandit]

well, lets not forget that you have a diesel, the current that a diesel engine draws is huge. and even huger for the torquey power house that is a 200 tdi. also are you only using a battery ? if so this will just plumit in 30 secs then will never have the poweer to start your system. you need to slave it from vehicle with similar power, also though the dead battery on the vehicle may be dead ! if its below 9 V then youlll be lucky to charge it off the vehicle, youll need to bench charge it, and if its below 3 V then youll be luckyky to bench charge it without any house hold charger .

when the AA comeout to jump start cars like these, they hook to the vehicle and a massive power booster , this pumps huge ampage into the system which starts the engine.

hope that helps

 

[oxides]

A dodgy set of jump leads or a poorly made connection to either battery will give you a good voltage until you try to pull current through them. You need to look at the voltage on your battery while attempting to start to see if the problem is between the jumping vehicle and the battery or the battery and the starter. If there's not enough volts to run the dash lights I suspect your jump leads. When jumping a dead flat battery it's worth putting the leads on for a few minutes to put a little charge in 'cos the dead battery alone can pull the whole system down.

 

[Sir DD of Cumbria]

well, lets not forget that you have a diesel, the current that a diesel engine draws is huge. and even huger for the torquey power house that is a 200 tdi. also are you only using a battery ? if so this will just plumit in 30 secs then will never have the poweer to start your system. you need to slave it from vehicle with similar power, also though the dead battery on the vehicle may be dead ! if its below 9 V then youlll be lucky to charge it off the vehicle, youll need to bench charge it, and if its below 3 V then youll be luckyky to bench charge it without any house hold charger .

when the AA comeout to jump start cars like these, they hook to the vehicle and a massive power booster , this pumps huge ampage into the system which starts the engine.

hope that helps

the battery read 12.6v the vehicle used for jump was a 2.5 tdi vw transporter with an upgraded bosch 120Ah battery but thanks anyway

 

[Sir DD of Cumbria]

A dodgy set of jump leads or a poorly made connection to either battery will give you a good voltage until you try to pull current through them. You need to look at the voltage on your battery while attempting to start to see if the problem is between the jumping vehicle and the battery or the battery and the starter. If there's not enough volts to run the dash lights I suspect your jump leads. When jumping a dead flat battery it's worth putting the leads on for a few minutes to put a little charge in 'cos the dead battery alone can pull the whole system down.

Battery was 12.6v will check drop on voltage when i get the fooker home, I left the vehicle to charge for nearly 15 mins while cabled to the donor battery for jumping. Got a feeling its the ignition switch as i seem to remember the central locking working. If I'd only thought to switch the hazards on to see if they worked:doh:

 

[theorangebandit]

this is rather odd, it def not a power fault mate. does the vehicel attempt to turn over ? if not it could be the relay , if when turning the key you do get a click then its not the relay, that then leaves the ign switch, if its not that then have fun chasing wires. however, there is a 30 amp fast blow fuse under the centre bit between the chairs, this is for the start system, if thats blown then youll never nothing will happen when you try to turn it,. also the start system runs through the alternator before getting to the starter. it could be a fault within the alternator. theres a large array of possibilities there for you , but im not with you to check these, shame really.