Hi again. I have been out of the country for a few months but back home now ready to do some work on the bird. I did the test that Dr suggested a few months ago was no change in the operation of the lights with the alternator disconnected. I am continuing to try to run down intermittent electrical issues on my 1967 Firebird. Trying to find all the grounding issues that come with buying a 50 + year old car that sat since 1978 until March of 2020 has been a fun (but sometime frustrating) process. I have all the engine and chassis grounding straps in good shape and they test fine with a test light and a meter. I am working on the grounding under the dash. I have the grounding wire mechanism that attaches to the Bright Light indicator, the dash, and the gauge cluster in place. That ground test fine too with test light and meter. I continue to have issues with intermittent dimming of the dash lights, headlights, interior lights ect when the car is running. I do not get the dimming/flickering when the car is not running but the lights are not as bright when the car is not running. I am not as concerned about that as I am about the dimming and flickering when the car is running. I have a couple of questions. 1. The alternator is a AC Delco Remy 10DN. I was checking those connections this morning and noticed that there is not a ground wire on the ground terminal of the alternator. I am sure there was not a wire there when I took the old alternator off because I take pictures of everything before I disassemble something. Can you tell me specifically where that ground wire goes on the car from that terminal. I wasn't able to find any pictures or info on the web and my electric diagrams just show a ground symbol but not the location. I am not sure if it grounds to the alternator case, the chassis, the voltage regulator, or somewhere else. If you have a picture of the wire and where it connects that would be great. By the way, I connected my test light to Battery + and then grounded it to the every area I could try on the alternator including the ground terminal that does not have a wire connected, the alternator case, the alternator bracket and have a good ground in all of those. 2. I know that there is a grounding mechanism that attaches to the bright light indicator, the gauge cluster, and the dash that is important for proper dash lighting. That is the only ground I can find under the dash. I do not see a ground near the light switch, the radio, the heater controls or anywhere else. Are there other gounding straps under the dash that I am missing that might be causing my issues. If there is any kind of under the dash grounding diagrams that would be very helpful. I really appreciate the input and solid info I receive from the people on this site and hope you can help. Thanks Ron