Since my first Toyota truck in the late '80s, I've always wanted to have BOTH the turn signal light and the side/front parking light illuminated simultaneously. Being lazy, I never bothered to actually wire it up.
This mod is for the lazy modder
The front turn signal is actually set up for the "running light" mod -- the bulb has 2 filaments, and the socket has 3 pins (ground, blinker, and running light). All I did was run one wire from the turn signal pin to the side marker light. So easy!!
My truck does NOT have DRLs; and I don't know the possible negative interactions (if any) that may arise because of them.
Without the headlight on ...
With the headlight on ...
BTW: the intensity of the turn signal is equal to that of the side marker light .. even though it appears brighter in the pic.