Those of you who are well traveled on the forums and Facebook will recognize these symptoms, but I am hitting a wall with diagnosis. 04 D2 is having a crank no start condition with flashing hazard lights that will not quit. First thought is that the inertia switch has been triggered. It wasn’t, but since I have multiple parts trucks, I swapped it with one from a running truck. No change. My scanner tells me that the switch is triggered, so I tried another, still no start. I swapped out the engine fuse box, and made sure that I didn’t have any blown fuses under the hood and under the column. Not starting. I wired the inertia switch wires together to eliminate the switch, still nothing. I read in a forum post to bridge the contact terminals at relay R9. Voila! We have a running engine! But the hazard lights still flash and the scanner still shows that the inertia switch is triggered. I tried swapping the BCM, then the ECM from a parts truck. No changes. With R9 relay installed, no start. Clearly, I shouldn’t drive around with a paper clip instead of a relay, and the hazard lights still won’t quit. I am ready to hear any and all suggestions that anyone can present. Tearing what little hair I have left out. Oh, I should mention, I bought it in this condition. The PO couldn’t figure it out either. I have three parts trucks, so I have plenty of parts. I just need some direction. Thank you in advance for your help.
