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2012 Chevy Impala Theft deterrent module (TDM)
What precipitated this is I had to figure out what wires were what in the ignition harness. I tapped into the red wire with white stripe in the ignition harness to verify that it's the constant power supply which it was. Next, I verified the pink wire as the ignition wire as well. What I am confused or don't understand is why the TDM engaged. I was very careful not to short out any tapped wires to ground or with other wires. Most importantly, I used a high impedance multi meter (10 mega ohms) to verify which wires were what. Can the TDM sense a 10 mega ohm meter which is designed to be computer safe for circuits and shut down the car? How can I reset the TDM? Thanks