What have you done to your 2.5 gen Tundra today?

Wow and on a new battery.

 

Ok, who did it?

 

Yep. Father in law changed the battery for her s few weeks ago and he said the terminals were corroded then. He cleaned and sprayed them. Once they get corroded you never fully get rid of it. I swapped the terminal out with a cheap one from AutoZone but will order an OEM one to replace it.

 

I've always had luck cleaning terminals like that with a simple soak in some coca-cola. Once clean and dry or on new ones, I've always liked noco ncp2 spray.

 

Yep. Probably the issue.

 

So you just needed a short Ethernet cable from the SG3 to the couplet then?

 

Failed to start this morning. It started after a few tries. I'll verify with her but it didn't click or anything. When she brought it over last night, I started it 8 or 9 times in a row. I replaced the terminal and started it another 5 or 6 times. Seems like it doesn't want to start after it sits for a few hours. The battery may be leaking to cause the corrosion but I dont know if it could also have any other issues that is causing the problem. The starter sounds strong when it is starting.

 

With the amount of corrosion you had on the terminals, did you end up just replacing the terminal or the entire cable??

There's a good chance you may have a significant amount of corrosion that's not visible in the cable (hidden by the sheath), and if so you'll end up needing to replace the entire cable(s) to get a clean connection...