So I'm a little skeptical about these two parts being all you need for this to work correctly.
Observations:
These bulbs have basically three settings they can be in; Off-Lo-Hi. From what I've always seen in DTRLs is when they are on they stay in Lo all the time. When the flashers or blinker come on they switch between Hi and Lo. Well from the pics posted by people in here who have done this and a couple people mentioning these being so bright, looks to me like the lights are always on Hi. (could also explain some people's melting lenses with it being in Hi all the time and creating more heat)
Question:
After doing this method of the mod does the blinker/flasher blink on and off or Hi and Lo?
More observation:
Now looking at this version of this mod
http://www.toyotanation.com/forum/t164710.html The lights definitely alternate between Hi and Lo, demonstrated by the pics posted. This mod utilizes the third wire on the plug to the wire. I can only assume this extra wire controls the low portion of the bulb.
Questions:
Do trucks with DTRL from the factory Utilize this extra wire plug?
Am I on to something here?
I know it keeps being said that these two module things is all Toyota would do to put it in, but my logic and observations are telling me that there's more to it. I think you need these two parts in addition to that third wire being utilized and wired into the main harness somehow (not just wiring it up to the other bulb).