Sorry for late reply. I finally had a chance to check the voltage and all seems ok, 12.3 when is running.

I've now received a second warning from the comp, overheating. This must be due to one of the airbags being on it's way out...I hope it will hold until the weather improves. I'll recond the comp and change airbag as a start....we'll see.

Thanks for your help Ricky