Well checking for a battery drain is generally straight forward. You need an ammeter that will read 10A DC or you could use a clamp meter. Switch everything off in the car. Disconnect one battery lead/terminal and connect in the ammeter in circuit observing polarity.
Check if the ammeter shows anything. It will show a few milliamps that the clock is using. If its showing over 1 amp you need to remove each fuse from both fuse boxes and note the meter again. If the current drops after you remove a particular fuse then the current draw is in that circuit. You need to check what components are fed from that fuse and disconnect each one in turn until the current drops again. Then you will know which component is causing the battery drain.
Thanks for the help. I measured the voltage drop one night at 1.5 v. After pulling the fuse on the radio fuse the voltage drop was measured at .23 v. Any ideas on where to get a new or rebuilt radio and how to install. thanks
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