RJR's method is sound as well. Just another version of process of elimination. If you can't find heat you will have to isolate things somehow. How you do it is the choice.
(the short reader went to a stepbrother, that is a dead end on info from this spot. Im thinking it may have come from a KD autoparts store (KD makes good automotive tools).
(hey, you can look at wire temp as well. They have a static temp just like everything else. Terminals and splices should be a tad hotter than wire lengths... I don't know how accurate your probe might be though.)
