It was very easy. Thank you to pequiod and 5 Cruiser for their photos in this thread https://forum.ih8mud.com/100-series-cruisers/43660-drl-question-lc-2.html#post5924976
Here is the switch set up I used
I opted for a 3 position switch - Mainly because it's what I had in the drawer.
position 1 - down = DRL on as normal
position 2 - mid = DRL disabled
position 3 - up = [Momentary] DRL on as normal or "flash" mode. returns to position 2 when released
Like 5Cruiser I Dremeled out the back of the mirror switch plate to make room for the switch. I soldered wires to the switch and used 3M bullets on the connection to the toyota wire harness. I left enough room to reconnect the DRL back to factory If I ever wanted to.
All told 35 minutes to make the mod. Very slick.
Here is the switch set up I used

I opted for a 3 position switch - Mainly because it's what I had in the drawer.
position 1 - down = DRL on as normal
position 2 - mid = DRL disabled
position 3 - up = [Momentary] DRL on as normal or "flash" mode. returns to position 2 when released
Like 5Cruiser I Dremeled out the back of the mirror switch plate to make room for the switch. I soldered wires to the switch and used 3M bullets on the connection to the toyota wire harness. I left enough room to reconnect the DRL back to factory If I ever wanted to.
All told 35 minutes to make the mod. Very slick.