All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
Application Notes: Make sure you use an incandescent test light, not LED. Make sure the ignition is switched off, the cabin doors are closed, and the headlamp switch knob is rotated fully CW ensuring that the dome/courtesy lamps are switched off. Any significant battery draw will illuminate the test light at normal full brightness; less than normal full brightness indicates an insignificant draw; not illuminated indicates zero draw.Is there a factory GM clock in the instrument cluster?
Correct, clamp on the cable terminal and the needle on the battery post/anode. If all is well, there will be no light.