My 2011 xf 3.0d is completely electrically dead...There is no resistence measurement at the battery earth lead connection?

 

Age of battery?
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New battery ready to install, but not on car at the mo...old battery is disconnected. No resistance on earth cable?
Cannot open boot?

 

No resistance between the earth cable and what?

 

My question exactly!

 

The chassis.

 

There shouldn't be resistance between the earth lead and the chassis, the negative battery post is supposed to have a good connection to the chassis via the earth cable, it carries the entire electrical load. Have you measured the battery voltage?

 

I had to take the rear seats out to get at the battery. Pita. All good now...thank's all for the advice.