The only reason a battery won't take a charge is if the battery is no good. Your intermittent concern may be caused by an intermittently pinched wire. Check these areas for pinched wires.
These critical pinch points are:
Other than that, have the battery tested and test the charging system for proper output.
When you say the only reason battery won't take charge is because it is bad
Let me clarify a little better what happens when I connect battery charger to make sure I communicated properly
When I connect battery charger red to positive on battery black to metal body the charger show no sign from battery. When I connect red to pos of battery and black to neg of battery all instruments flash including head lights interiorer lights and clicking is heard. The other two times this happens I kept moving key, brake peddal misc until battery charger showed positive signs of charge taking place. Does this still match what you think that battery is bad and then I still need to find source of intermittent discharge from possible wire issues
It has normally stayed charged and worked ok, except for the 3 times it died recently.
the first time took charge no problem
Last time and this problems getting it to charge
Seems to be locked out from the theft system, the light keep blinking while I am trying to charge, only charged after light went out
I have used trickle charge every time with cables hooked up to positive and metal ground