Problems making the connection to ground at remote locations on the vehicle is a sign of a ground problem. You need to correct this, not just put the ground clamp on the battery. Find the connections that ground the vehicle parts together., i.e. engine to body strap, hood to body (if you've got one). disconnect these. Clean with sandpaper, wipe with a solvent (acetone or alcohol) and reconnect. Be sure that they are tight. These straps & wires were put there for a reason (reduction of static in your radio, for one). Don't ignore them.