Standard gauge wire used for radio?

[DataCrypt]

In hooking up my new radio (Pioneer AVIC-X930BT) to replace my factory radio in my '02 Tacoma, I need to run a couple of wire signals that are not located at the factory harness/plugs behind the radio. These are the reverse signal wire (for the backup camera) and the VSS (speed wire for the GPS signal). One is located behind the glove box and the other under the drivers side chair (under the carpet from my understanding).

 

So, I would like to run the same gauge wire over to the radio as what is used by Toyota in their wiring. Not sure what that is. I can't really tell by looking at the Metra harness (#70-1761) what gauge these are either. Maybe 18 gauge? This will also help me get a couple of correct wire tap connectors.

 

Any help would be appreciated.

 

Thank you,

 

DataCrypt