I have been searching for an answer to this, because I recently got a 96 Lumina from a family friend, whose mechanic soldered in the spare key instead of a new resistor. That fix worked for about a month, but now is not working. I assume that some of the wiring/solder came loose, so I am planning on checking all of the connections and replacing the key with a new resistor, but I would like to bypass the TDM as well. I found this site:http://newrockies.ca/the-problem-and-the-solution/
. Might be out of my league though, so something simpler might be nice.