This mod adds an on/off switch to the "factory" DRL (Driving Running Lights) - For those with the "stock/factory" DRL option, or those that applied the "Factory DRL mod" as described in this DIY: https://www.toyotanation.com/forum/t176420.html
In case you're worried, this mod does not affect the "Turn Signal" or "Hazard" lights - Everything will function as expected, and you'll simply have a way to disable/enable DRL on demand, with an On/Off switch.
It was actually simpler than I expected... As shown below, all you have to do is interrupt the DRL signal, which is on the "Light-Green & Red" wire of the DRL harness (harness with 2 plugs on it - Part #82241-04030), which is connected to the DRL-capable relay (Part #81980-35020). Refer to the DIY mentioned above for suplementary installation instructions.
I hope you like this mod as much as I do.
I used an illuminated "Fog Light" switch, installed on one of the unused in-dash slots.
The two OEM-switch options I can suggest are:
1) Older Tacoma switch: Part#00550-35976 ($6.98)
2) 05+ Tacoma switch: you'll need 3 part #'s:
Fog Light Switch - #84160-04010 ($35.88)
Connector Housing - #90980-11090 ($2.63)
Wires for Connector - #82998-12340 ($4.04)