[Stinky 911T]

JAE - I disagree with your statement that grounding a light to turn it on would be "bad engineering". It is very common for all auto makers to use the body of a car for the return path for most of the circuits. The way the door switches work on my 911T (and probably on all other 911s, too) is that when the door is opened, the spring loaded switch connects the brown (ground) wire to the body to complete the cabin light circuit. When the door is closed, the switch opens the connection to ground and thereby turns off the lights.

The deck lid ground straps are to ground metal lids and reduce the amount of radio frequency electrical noise radiating from the high voltage ignition wires. They do not do any good if you have a fiberglass lid.

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Bob Thayer
1971 911T
rthayer@hdrinc.com