Depending on how much of a lunatic you are 
 
	 
 
	Get hold of a TDR ,measure the length of the cable , you may need to stick on a 100m before attaching that one might give distance for you to look at 
 
	 
 
	Like I said it's only if your bored and a lunatic and so on 
 
	 
 
	With the distance it can only be so far hahaha 
 
	 
 
	Otherwise tone tracer might help , but switch off all electrics at fuse box before trying to tone trace it