Citroen Xantia Starting problems

[YamR1V64motion]

there seems to not be enough power going to the starter motor, the motor is still turning over though but just not enough to start the car, i did think it was the battery at first but it did the same thing with a new battery, does anyone have any ideas about what it could be?, im guessing maybe the cable from the battery to the starter motor?.

[Mikey G]

Worth checking the earth wires too, not sure where they locate but normally on PSA cars the engine earth is on the top of the gearbox.

[megamaniac]

Try putting a jump lead from the engine to the battery earth if it starts up properly then definitely the earths .Diesel engines need very good large earth cables to start well .