Originally Posted by
jbarracl
I think you can use a multi-meter and stick one probe on the neg terminal of your battery and the other in the coolant in your radiator and check the reading. What an acceptable reading is, I dont know, you may need to check that out.
Best to just get an earth strap and connect it from your radiator to either a point on your chassis or engine just to be sure.
Maybe if you put a query in the tech section you may be able to get some info from someone with a bit more knowledge than me.