At first the car would start with the key -- then no stop -- then no start all the time - posible key elec switch -- but now when i do start it the dash gauges don't come to life -- to turn the engine off i have to pull a relay out -- up front right under hood and disconnect battery lead

 

Your car is considered an X300 so you should post in the appropriate section for better answers.

https://www.jaguarforums.com/forum/xj-xj6-xjr6-x300-26/

bob