diyanich,

Thanks for the quick reply, but I'm sorry, I don't follow what you're saying. Been a long week, and I'm pretty tired, which is probably contributing to my inability to comprehend...

Which insulation are you referring to? Where exactly do you connect the multimeter's lead after putting it through this insulation? And which lead are you referring to for this, the red or the black one? What do I do with the other lead while I'm doing this? And I don't understand the purpose of removing the nut from the negative cable where it meets the chassis. What do I do after removing this nut?

Obviously, I'm completely lost. Could you please go through what you're proposing step by step, assuming I'm a complete ignoramus (definitely not a bad assumption!)? It sounds like you know what you're talking about; I'd just like to be able to follow the procedure you're recommending. Thanks, and sorry for being so dense.

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2003 X5 4.4i
1992 Porsche 968
2007 328i
2014 Subaru Forester XT