The Ridgeline had been sitting for a while this Iowa winter - maybe a month - and it made the clickety click of a solenoid with low voltage when I tried to start it. I put the big battery charger on it overnight and still no action. I cleaned up the easy to reach body ground, and actually it was shiny bright and tight. I also polished up the battery posts and cable ends, applying grease to slow oxidation. Today I went out with a fully charged jump pack, attached to the battery, and got nothing...no dash lights, no solenoid or relay noise when I turned the key. Where do I go from here?