Hi all. Today I bought a new test light and was checking it across the top of the battery and it lite up. Ground end to neg battery cable end to block and touched positive side of battery and no light. Small neg wire on core support and touch hot side of battery no light on. What gives? Main neg wire been there it’s whole life and always starts when I turn the key. Please enlighten me cause it’s def weird. No battery draws, no hot positive wire suggesting looking for a ground just scratching my head on this one. TIA Almost forgot battery was disconnected while preforming tests.