- glantz Member
Backstory:
Before final taping and install of the main wire harness I wanted to test that it worked (that way if there were issues I wouldn't have to cut tape to access the harness). I taped rings every 12 inches or so to keep it organized. While testing, I discovered a no crank situation caused by a couple of issues. My first problem was easy, I didn't have the 50amp cable plugged in to the battery. Once I plugged that in it gave me everything except crank. From there I isolated the second issue to a ground I missed from the BCM. I soldered that into the rest of the grounds up front on the pedal box and boom! Fired right up! Success! I tested over a couple days to make sure it was good while I worked on other things. Worked perfectly! Pulled codes and just got the usual codes. Success!
Current Problem:
Now here comes the bad... I did the final taping, routing and zip tying of the harness in it's final position, made it look nice and neat. Connected everything back up. I went to fire it up and wasn't getting display on the instrument cluster... oops forgot the plug to the cluster. Plugged that in, tried again, cluster works but no crank almost like the 50amp plug was unplugged (again). Inspected that, it was plugged in but I did see that the large multi-plug was not fastened all the way on the back of the BCM. I got my 7mm and tightened it down. Went to the key again, got fuel pump, butterfly movement, tried to start, starter activated for a half a second, then... POP! Now there's nothing. I don't get fuel pump, I don't get butterfly movement on intake, I don't get a start (of course) but the kicker is I don't get communication at DLC anymore either. I'm really hoping I didn't fry the electronics when I had a partial connection on the BCM plug, or when I plugged it back in.
There is one possible hint and that is I now get a "power steering" message on the display. Don't think I was getting that before. I could be way off but I feel like some others had faulty EPS electronics and it possibly caused no start and communication issues. Besides that, I have no idea where to go from here. I really don't think this is wiring or ground as I really didn't do much to it from the time it worked and didn't. I went over all the grounds and data wires during my first issues and everything checked out at the time. I'll check again just to rule it out but I think that's probably not it. I just tapped a couple places, routed and plugged back in and all of that was in the front. The ground lugs were never removed while taping and routing. None of the engine side was moved or modified during that time either. All of the taping and routing was only in the front. I used a probe and checked all fuses in front and back. When I turn the key I can hear relays on the BCM and that's about it. I'm in over my head here now. I can't believe it. It was working great. Thought I was done. I was so thrilled and excited that I didn't have any major electrical issues and was getting pretty close to being done . Now this.. Ugh!
Before final taping and install of the main wire harness I wanted to test that it worked (that way if there were issues I wouldn't have to cut tape to access the harness). I taped rings every 12 inches or so to keep it organized. While testing, I discovered a no crank situation caused by a couple of issues. My first problem was easy, I didn't have the 50amp cable plugged in to the battery. Once I plugged that in it gave me everything except crank. From there I isolated the second issue to a ground I missed from the BCM. I soldered that into the rest of the grounds up front on the pedal box and boom! Fired right up! Success! I tested over a couple days to make sure it was good while I worked on other things. Worked perfectly! Pulled codes and just got the usual codes. Success!
Current Problem:
Now here comes the bad... I did the final taping, routing and zip tying of the harness in it's final position, made it look nice and neat. Connected everything back up. I went to fire it up and wasn't getting display on the instrument cluster... oops forgot the plug to the cluster. Plugged that in, tried again, cluster works but no crank almost like the 50amp plug was unplugged (again). Inspected that, it was plugged in but I did see that the large multi-plug was not fastened all the way on the back of the BCM. I got my 7mm and tightened it down. Went to the key again, got fuel pump, butterfly movement, tried to start, starter activated for a half a second, then... POP! Now there's nothing. I don't get fuel pump, I don't get butterfly movement on intake, I don't get a start (of course) but the kicker is I don't get communication at DLC anymore either. I'm really hoping I didn't fry the electronics when I had a partial connection on the BCM plug, or when I plugged it back in.
There is one possible hint and that is I now get a "power steering" message on the display. Don't think I was getting that before. I could be way off but I feel like some others had faulty EPS electronics and it possibly caused no start and communication issues. Besides that, I have no idea where to go from here. I really don't think this is wiring or ground as I really didn't do much to it from the time it worked and didn't. I went over all the grounds and data wires during my first issues and everything checked out at the time. I'll check again just to rule it out but I think that's probably not it. I just tapped a couple places, routed and plugged back in and all of that was in the front. The ground lugs were never removed while taping and routing. None of the engine side was moved or modified during that time either. All of the taping and routing was only in the front. I used a probe and checked all fuses in front and back. When I turn the key I can hear relays on the BCM and that's about it. I'm in over my head here now. I can't believe it. It was working great. Thought I was done. I was so thrilled and excited that I didn't have any major electrical issues and was getting pretty close to being done . Now this.. Ugh!
It's updated. I'll run another check on the data wiring next. It's just throwing me off since it was working then stopped working in such a sudden way. Feels like something blew. It's definitely possible that something was shorted during the taping and routing though and it's a place to start. That's a very helpful document.
