Lorry battery help & jump starting.....please!

[Coop]

Disconnect the batteries completely by removing the negative lead first, followed by the link between the two batteries, followed by the positive lead.
Then charge one of the two batteries with a 12 volt charger until it is fully charged.
Then charge the remainder of the two batteries with a 12 volt charger until it is fully charged.
(You can buy battery chargers from Halfords but buy the heavy duty charger for batteries in diesel engined vehicles)
When you reconnect the batteries connect the positive lead first to the positive pole of the battery, then the connector between the two batteries and lastly the negative lead.
Your vehicle should then start, however if the batteries go flat again or won't charge then but two new good quality batteries.

Thanks for your help, I got 2 new batteries in the end, apparently they were quite old and would not keep their charge. It was jumped with a pack by my mechanic and ran ok, but I decided to replace them anyway. Nice to know how I should be charging them now thankyou. Its been fine ever since, and starting quicker, oh, apart from running out of diesel today lol!! Another lesson learnt-don't trust the fuel gauge! Thank god I carry a big diesel can on board