My wife's Crossfire (2005 Roadster) has been sitting since May. In early August the battery was still good, but when I came back from a vacation the battery was dead. It measured 1.8V. I replaced the battery, but noticed the a voltage drop in a few hours.

I have perused the forum but not found any issues that seem to match my symptoms. Here is my troubleshooting so far.

I have not found any device, light, or function left on. When I connect a trouble light between the battery and a cable the light glows very strongly, indicating a strong current flow. I have removed and inserted all the fuses I could find (one at a time). This includes the fuses at the left edge of the dashboard, the fuses in the engine compartment in front of the driver, and the fuses in the engine compartment box in front of the passenger. The current draw still continued. When I unbolted the electrical wire to the 200 amp fuse (Labeled Fuse Box Terminal 30) the test light will go out. So far I have not found the battery drain source. When I reconnect the battery cable I hear a loud click in one of the the ECM boxes in the engine compartment in front of the passenger. This is in the ECM box closest to the right fender. I do not know what this ECM unit controls.

Any ideas? I am looking for a wiring diagram and manuals to further my troubleshooting. Any suggestions on where to find a wiring diagram?

Thanks in advance
Randy