No start but have power/ Tahoe running and then gages drop

[about20ninj45]

Yes. But I'm lazy and haven't looked. I'll see if I can muster up the energy to look for it.

 

[TaboltB2015]

Yes. But I'm lazy and haven't looked. I'll see if I can muster up the energy to look for it.

Welp the guy that was gonna come look at it say he will not look at it until it’s 100% dead in the water, which understand because it’s a intermittent issue that’s gonna need a lot of time, so I’m kinda at a stand still.. I checked more wires and they all look good with no problem, I would think that if there was a wire issue it would be a constant issue and disconnecting the battery shouldn’t temporarily fix it... so who knows


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[swathdiver]

...say he will not look at it until it’s 100% dead in the water,

Translation: I don't want to work on your car.

 

[TaboltB2015]

Translation: I don't want to work on your car.

I was like think like it’s his job to find the problem and not tell me I’m dead in the water nothing I can do for you, like ok I won’t give you my business in the future then if you wanna be that way, the other guy that did the BCM for me told me that I would have to leave it with him for a while equaling a lot of money which I don’t have. He did tell me tho I should look in to a quick disconnect for the battery do I don’t have to keep pulling the wire up and off, since I now how to get it going again..


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[jlee]

I’ve already replaced the mega amp fuse it came with the wire that goes to the starter


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Hmm. It still sounds like a power/ground issue affecting your bcm. Does your volt guage start dropping when you get the weird stuff going on like mine always did? If so, I think I read on the forum here you can disconnect the sensor in the ground cable to the battery to disable the "smart" charge crap. It sounds like the alternator will then put out a solid voltage when its running. I believe the voltage is monitored in the bcm, so it would be interesting to see what the guage does once the sensor is disconnected.

 

[TaboltB2015]

Hmm. It still sounds like a power/ground issue affecting your bcm. Does your volt guage start dropping when you get the weird stuff going on like mine always did? If so, I think I read on the forum here you can disconnect the sensor in the ground cable to the battery to disable the "smart" charge crap. It sounds like the alternator will then put out a solid voltage when its running. I believe the voltage is monitored in the bcm, so it would be interesting to see what the guage does once the sensor is disconnected.

Well when it starts acting up the battery gage will stay at 14 but once it’s goes to like complete crazy all the gages drop to 0 and stay there and I loose all power but the Tahoe stay running I just have no throttle


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[about20ninj45]

Welp the guy that was gonna come look at it say he will not look at it until it’s 100% dead in the water, which understand because it’s a intermittent issue that’s gonna need a lot of time, so I’m kinda at a stand still.. I checked more wires and they all look good with no problem, I would think that if there was a wire issue it would be a constant issue and disconnecting the battery shouldn’t temporarily fix it... so who knows


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Its not about how they look, you cant see the data across the wires ... Thats why I posted that. Heres the Diagram

Twisted pair leaving the BCM 17 & 18, 9&8, Data ground is 10

 

[about20ninj45]

 

[TaboltB2015]

Its not about how they look, you cant see the data across the wires ... Thats why I posted that. Heres the DiagramView attachment 203601

Twisted pair leaving the BCM 17 & 18, 9&8, Data ground is 10

I’ll have to check that when I get some time thanks for the share


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[about20ninj45]