with an older vehicle and an undiscovered milliamp level electrical fault,
use your eyes to look all over for “Green Death” corrosion deposits,
that horrible blue-green-grey colored stuff.
If you cannot find it with regular white light
sometimes using the Ultra-Violet flashlights that come with Freon leak spotting dye
in a totally dark garage will make Green Death glow faintly.
As a Christmas present I was just given a
Sharper Image Travel UV-C Sanitizing Wand
Item No 205847
that has a 4 watt UV-C tube
and an internal mercury switch that turns itself off it the light is not shined away from your eyes.
https://www.sharperimage.com/view/product/Travel+UV+Sanitizing+Wand/205847It is way brighter than my UV freon dye flashlight
or my Hunter’s urine/blood spotting UV flashlight.
