[lm6y]

I have an early 85 944 that has a problem. my battery light glows when the lights are on, windshield wipers, defog for the rear window etc. if the car is not driven for a few days, the battery is dead. with the ignition off, I found a drain on the battery that lasts for about ten seconds, then goes away for about thirty seconds, then starts the cycle again. I figured this was the clock. but i cleaned the battery terminals at both ends, and replaced the voltage regulator to no avail. I thought about running a ground wire straight to the alt. attaching bolt. any help? or is the alternator shot?