Unhooked Battery, now it won't start- Please help! *SOLVED*

[89Suburban]

@Scrapman call here and ask for Mark. See what he thinks. He doesn't know me but I heard about him and how good he is with electrical.

https://expertautoelectric.com/

 

[Brandon2489]

I believe I recall seeing a tsb about unhooking battery the wrong way and it may damage the bcm. I will see if I can find it.

 

[Brandon2489]

Here you go. Looks like what you may have disconnected was a ground path for the BCM.

 

[CaptainAmerica1]

Doh!

 

[George B]

I believe I recall seeing a tsb about unhooking battery the wrong way and it may damage the bcm. I will see if I can find it.

Here you go. Looks like what you may have disconnected was a ground path for the BCM.

Good find. I saw that too but wasn’t sure if it applied to the work the OP did. I didn’t look at it much closer.
I guess it comes as a reminder to always disconnect the battery before unplugging modules and such.

 

[Scrapman]

Here you go. Looks like what you may have disconnected was a ground path for the BCM.

According to that tsb, I did it correctly. I removed Only the negative battery cable, and the tsb says to do it first.

 

[Scrapman]

Here you go. Looks like what you may have disconnected was a ground path for the BCM.

ahhh,,, wait. Unless your saying the latch's plug contains a ground for the BCM....Then you hit the nail on the head.

Sadly, I don't have and couldn't find an electrical diagram to figure this out. Towing it to the only mechanic I trust today.

 

[CaptainAmerica1]

ahhh,,, wait. Unless your saying the latch's plug contains a ground for the BCM....Then you hit the nail on the head.

Sadly, I don't have and couldn't find an electrical diagram to figure this out. Towing it to the only mechanic I trust today.

This is what did it

 

[Scrapman]

This is what did it

Well crap. No one in any video I watched of people replacing their latch unhooked their battery.

I should have... I know better.

 

[CaptainAmerica1]

Still hypothesizing mind you…