Looks like I have a project this weekend. Just bought a new battery 2 days ago because I thought my other one had bit the dust. Well now my new battery is dead. Have to figure out what is drawing my battery down so I went to Auto zone and had them check the alternator while it was in the car running. The scanner came back as a bad diode and to bench test the alternator. While it was running the testing cycle, it caused the engine to shut off. I can turn wrenches pretty well, but I'm not an electrical person. Is the diode something I can change without taking the alternator out? If so where can I find it?