TACH PROBLEM

[TRIUM66@aol.com]

Had my non-functioning tachometer rebuilt and repair facility says that it is 
possible my [new] cable was the cause.   Needless to say, I do not want to 
pay another hundred bucks to repair.   (I know, I should have purchased a 
good used one!).

Can anyone fill me in on just how a cable could cause a tach to break and 
then what do I do to prevent this from happening again?   Thanks.