New battery no voltmeter used to check cable only visual inspection by mechanic nephew who thought cable lines in great shape and properly grounded. He couldn't believe the mint condition of the car. I agree we need to rule out low voltage issue. I will retest car and make sure dome light is being affected. This was reported by nephew not in my presence. Thanks so much and I will update over weekend once I perform testing. I will check voltage with voltmeter and look for any loose connections and get back.