On Tue, 14 Mar 2017 13:04:05 -0000, NY wrote:

What do you suggest for the next step in the investigation?

Well you have remade the connections.

Surely the OP has remade the connections many times - every time the
battery has been removed to recharge it and replaced to start the car.

I don't remember that being said. Charged yes but not removed other
than when being replace by a new one months to a year ago.

--
Cheers
Dave.