[Idiot Sable]

I have had recurring problem for my sable when i want to start, it seems there is no power at all but when i double hit battery left terminal it starts in few seconds though the battery is still brand new can u please tell me wat is the problem

 

[Jeff K]

Have you removed and cleaned the batt terminals and checked major grounds and inspected the batt cables for corrosion?

 

[Idiot Sable]

i cleaned treminal

dear Jeff I have cleaned the terminal but i dont know how to check the battery cables and how I know if they are bad for use i am sucks at cars please give me some instructions