Brain Feck. 03 TD5 Defender

Hello chaps. When i pull my handbrake up to the first notch, the the engine stutters or stops. Very reluctant to restart unless you pull it up or right down. Ive got the center cover of and nothing is stetched or pulling. Handbrake light switch is good. Doesnt make and difference whether the sender is unplugged or removed from the assembly. Gotta be a first yea?
Ta
Terry

Sounds like an earth/negative issue somewhere ??

Aaaaaahhhhhhh. SOMEWHERE. Ahhhhhhhhhjhjhj.
Ill get the garage leccy on it.
Thanks

no its not a first ,bad earth as said above is most likely, there should be 2 small earths secured to rhs of t/box and heavy duty on lhs of t/box