Small wire leaving positive terminal

[SDTOWPRO]

Does anyone know what this wire is for??? It leads to a 5 amp fuseholder...
Battery temp sensor maybe???
This is a 2023 Equinox LS.
Thanks in advance.

 

[bagbyjw]

I'd like to know also, I've tried to trace it back and got nowhere.

 

[rjenkins221]

The led underhood light I installed, ran the hot wire from that post

 

[TopHat]

Possibility, I found this for another vehicle:

"
The small wire attached to the negative battery cable serves an important purpose. It’s commonly referred to as a shield ground. Let me explain further:

1. Shield Ground: The smaller wire connects to the vehicle’s body and acts as a ground for shielding purposes. While the engine has various connections to the body, they might not always be tightly connected. This small wire ensures a good electrical connection between the engine and the body. It helps prevent interference and ensures proper grounding.
2. Other Ground Straps: In addition to the small wire at the battery, there may be other ground straps connecting the engine and body. These additional straps serve similar purposes, maintaining proper grounding throughout the vehicle.

Remember, maintaining good electrical connections is crucial for the overall performance and reliability of your vehicle. If you encounter any issues related to the battery or charging system, it’s essential to check these connections and ensure they are secure1

 

[TopHat]

I found this for 2011 Equinox so presumably works for all years. Ground wire.

 

[bagbyjw]

Original post stated small wire coming off the POSITIVE terminal. Has anyone got any idea why?

 

[ravenblack67]

That wire goes to a fuse and then to the ECM or BCM, depending on design. It is a battery sense unit. It controls the output of the alternator based on battery health.

 

[bagbyjw]

That wire goes to a fuse and then to the ECM or BCM, depending on design. It is a battery sense unit. It controls the output of the alternator based on battery health.

Thank you for the information, very helpful