Camaro 2010 V6 no crank no start

[frmd]

hi all i hope someone can help me out with problem

here's the story and sorry for my English*

the car generally work fine until this problem is happen so whenever i try to start the car put the key as usual turn to on then start boom nothing happen stabilietrack service pop up and parking assists service pop up also check engine go off and fuel gauge down to zero
try to start the car again nothing same
so what I'm doing I'm going to the harness connect to the EBCM and move it little the harness not the connector after that the car back normal and start like new doing the same issues for like 2 to 3 month so i decide to change all the harness from the EBCM going to fuse box box to instrument cluster*
after changing all the work fine for like 15 days without any issues*
suddenly today she do the same problem try to start the car nothing*
i touched again the harness near ebcm in the same place the car start normally*
with scan tool get code U0100 and U0101 lost communication with ECM / PCM A and lost communication with TCM*
if anyone face the same problem plz let me know how to fix this issue*
video showing the issue*
https://youtu.be/BYUtOQI4FSU

[hunter1660]

Sounds like pins in connectors not making good contact.. Might tweak those for better connection? Good luck....

[PepeLePew]

I agree with Hunter. If you wiggle the harnesses connected to the BCM and it works again, you probably have a loose pin somewhere. Since the harness is new, it might mean you need a BCM. I wouldn't recommend trying to open it up and work on it unless you are an expert. If you find out it is the BCM, you'll have to program it to work.

[frmd]

Originally Posted by PepeLePew

I agree with Hunter. If you wiggle the harnesses connected to the BCM and it works again, you probably have a loose pin somewhere. Since the harness is new, it might mean you need a BCM. I wouldn't recommend trying to open it up and work on it unless you are an expert. If you find out it is the BCM, you'll have to program it to work.

UPDATE
after changing all the harness which included the ebcm connector the car still do the same problem
so i change the ebcm also with other one the car work fin for couple days then same problem again no crank no start until u touched the same harness in the same spot the car back normal and work fantastic

my old EBCM i opened as I'm electronic engineering and check pin by pin all looking good no loose no cute

[frmd]

Originally Posted by hunter1660

Sounds like pins in connectors not making good contact.. Might tweak those for better connection? Good luck....

UPDATE
the connector to the EBCM change as well as the harness all but still the same issues whenever then no crank no start just touch the harness in the showing pic with red circle the car back normal and start smoothly

this problem turning me crazy

[PepeLePew]

I ignored the E in EBCM. I thought you were talking about the Body Contol Module not the Brake control module that I see in the picture now. I’m still baffled by your symptoms and your temporary fix by wiggling the harness. That would indicate to me that the fault is in the harness or the module. The only other thing I can think is to test fuse 43 to see if it is good and fully seated. But I don’t think that is your problem.

[PowertoLove]

I would open up the harness and check for broken wires inside the insulation on the wires. Sometimes a wire can break right at the connector or inside its insulation. The wire may look ok on the outside but the wire is broken inside. Easy test is to open the harness then gently pull on each wire to see if the insulation stretches as you pull on it. Can be right at the connections too. Good Luck

[frmd]

Originally Posted by PowertoLove

I would open up the harness and check for broken wires inside the insulation on the wires. Sometimes a wire can break right at the connector or inside its insulation. The wire may look ok on the outside but the wire is broken inside. Easy test is to open the harness then gently pull on each wire to see if the insulation stretches as you pull on it. Can be right at the connections too. Good Luck

Thanks bro for your reply juste for your information i was thinking like this me also and i checked them one by one stretching trying to figure out but didn't found so i change all the harness that go to everywhere in the car with new one but still same problem in same place