Hi, my battery light on my March Cabriolet is staying on even after fully charging. It's just managing to charge under no load, but drops down as soon as sidelights on or blower on 1. It is original Bosch 65A with one bolt on + wire and the block connector with skinny power feed. Main question I can't find is how to remove it when the air con pipe is blocking its removal? Rupert (near Plymouth).