2016 Taurus Battery ground

My battery ground terminal became ate up with corrosion. it traveled down the ground wire and rotted the insulation layer for 4-5 inches, so now i am having starting/charging issues. I cleaned up the terminals but the problem is not solved. I need to replace the 2 wires from the battery lead.

Does anyone have a diagram where these 2 main ground wire go? They disappear into a loom. I would like to replace/upgrade them.

Thanks!

Your best bet is probably to open up the harness and trace the cables to where they terminate. The main ground is probably relatively short and likely is bolted to the engine block. The smaller one is probably still pretty short, but I'm not sure where it will connect to. It's probably connectorized though so you may want to purchase a new ground cable by application. The dealership may be your best bet for that.

-Rod

I hope external links are OK. i found some great resources after a deepdive last night. Hopefully i can upgrade these without replacing the entire loom. My new question is what happens when the ground wire bypasses the "battery current sensor" that it runs thru before hitting the loom.

Wiring Diagrams http://fordtaurus.scienceontheweb.net/2014%20Taurus/Wiring%20Diagrams.htm

Service Manual
http://fordtaurus.scienceontheweb.net/2014%20Taurus/Service%20Manual.htm

Those are great resources, thanks for sharing! External links are okay if they are not to non-relevant sales sites or to drive traffic to a personal site.

Per section 414-01 of the service manual you linked to, I think I see what you are referring to as the current sensor. I bet that makes the negative battery cable pretty expensive. I would like to think if the battery sensor was not installed the ECU would just default to a normal alternator charge like they used to do, but I'm not positive (no polarity pun intended) on that. It seems that your best bet would be to replace the ground terminal, battery current sensor, and cable pigtails.

-Rod