Thanks to all those who have taken the trouble to respond.
I guess the question I would like answering is this: given that 2 x 12v batteries supplying a 12v circuit and only one shows a voltage drop in use, is there a possible explanation for this other than a fault somewhere?
It seems to a non-electrician that there must be, but the links and circuit gizmos are buried beneath the seats and without taking these out, it is impossible to see what is there.
Could it be that some magic goes on here to account for my observations?
The supplier of my vehicle reckons all is well and the batteries are working together.?
How can that be if in use, only one shows a voltage drop?
What am I missing?
Phil
