Unused wires under hood

Anyone know what these white unused wires are for? I assuming some kind of package my truck does not have that is pre-wired. The wires end and looks like they have heat shrink on them at the ends.

They are located on right side of engine compartment next to the battery.

I have a 2021 TRD Off Road Automatic with technology package only.

 

I have a 2021 TRD Off Road Automatic with technology package only.

 

Looks like ground wires grouped together

 

Probably for an option that your truck doesn't include.

 

looks like a series of ground splices.. there all over in the harnesses. some you can see, some not

wires that color are always grounds on these trucks

 

I just edited my post. Was typing with my ass cheeks again.

 

I have a limited with the same bundles of wires, trucks also a 2016, I was just googling to see what they were and came across this post. I won’t bother creating a new thread for the same thing.

 

IF these are ground wires, couldn't we theoretically ground accessories with them? Don't know much about vehicle wiring except that mistakes hurt, cause smoke, and smell funny - so I gotta ask.

 

So true.

Yes, wires on our Toyotas colored white with a black tracer are GROUNDS. In most cases you can find a stud or bolt to ground to, so getting into these type of splices is generally unnecessary.

 

That's what I've done in the past. It would be interesting to see if these "spare" grounds could be used. The tried & true will work for now.

 

I have the same bundle on my 2020 Pro.

 

I guess it’s just good to have some extra grounding. On the bright side it’s something from the factory and not a remote start or some other left over mess from the previous owner so I can leave it alone and not worry about it.

 

These grounds are filled with sealant or glue to keep them waterproof and from corroding. It would be best not to disturb them without the same adequate treatment. Especially the ones located outside the cab. Theses splices occur through out the vehicle.