I don't know if they're still available but I have a couple of the Blue point current indicators.
They're pretty neat, they look like a dash amp gauge and you lay them across the wire and it shows current flow. (inductive)
I think they were also available from cal-van tools.
Here's the PN's for the Blue Points:
Alternator meter (100-0-100) MT110
Starter meter (600-0-600) MT109
Found 'em:
http://buy1.snapon.com/catalog/item....re&dir=catalog