Looking for some help in finding the cause of the battery drain. Here is what I have done.

Overnight ended up with 8.5 volts of battery, not enough for a start. Disconnected the -ve battery, set up parallel on negative cable to negative post.

test light on bright.

Next disconnected one fuse at a time to find a marked difference when disconnecting fuse in "C" position which includes
rear roof light checked OK
rear locking system not sure how to test
seat back arrestor central locking system not sure how to test
door lights, check ok
reading lights, check OK
auto antena disconnected plug, no change top light
contol for seat adjustment. functions OK

I am not havuing luck finding. Maybe the locking system where do I start or continue?

Trunk light check out ok
reading lamps OK

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Walter Sawczak
1990 300 E
1993 Lincoln Mark VIII
1983 Jaguar XJ6