To prevent current from going from the turn signal wire, thru the splice, back to the turn signal switch. I think they are unnecessary though, looking at the diagram of the turn signal switch. Continuity from the running light power source to the turn signals should be broken when you turn on that turn signal. You should test to make sure. Take your DMM, unplug the wires to the left signal. Stick black probe in ground, turn your left turn signal on. Stick the red probe into the O/W. If you see 0v, youre good. Current from your O wire isnt going to travel back up the O/W from your splice to the switch and no power will go from the switch thru the running light to the turn signal, because there will be no continuity.
A digital multi meter. I'll be up in San Jose this saturday thru wednesday. Throw all your parts in a backpack, come meet me, we'll get this taken care of.

That post from CBRforum is what you want to do. You are combining a 3-wire system that's meant to be used with the original dual-filament bulb into a 2-wire system that uses a single-filament bulb (or LED). You will just add the mirror lights to the flush-mounts with a Y-connection.I found a post for just soldering the flush mounts, but it doesn't include wiring led mirrors.
http://cbrforum.com/forum/how-mechanical-40/convert-2-wire-signals-3-wire-inputs-84998/
Whats the reason for the diodes?
EDIT: And do I need to put diodes in too?
Wow this got confusing really fast lolThat post from CBRforum is what you want to do. You are combining a 3-wire system that's meant to be used with the original dual-filament bulb into a 2-wire system that uses a single-filament bulb (or LED). You will just add the mirror lights to the flush-mounts with a Y-connection.
By connecting the O & O/W and B & B/W wires together, you've combined the turn-signals AND driving-lights together. Both your rear turn-signals and dash-indicators will turn into driving-lights and be on all the time. The function of the diodes are to keep the driving-light signal from running through your turn-signal wiring. Your front flush-mounts & mirror lights will be on from the driving-lights signal, yet your rear lights and dash-indicators will be off. Then when the turn-signal switch is flipped to left/right, BOTH your front & rear lights will flash in unison, like they should.
The CBRforum guide will work if you can follow it. You can re-use the two-pin connectors that came with the flush-mounts. But you'll re-wire it so that the connector carries the driving-lights and turn-signals power, while the black will connect to green-ground through a separate 1-pin connector. I can work up a diagram for you later if this or the CBRforum post doesn't make sense.
The trick to successfull wiring is to take it one step at a time, one wire at a time.
EDIT: Took a look at the wiring-diagram and you actually only need one diode per side. It goes on the turn-signal wire.
Wow this got confusing really fast lol
cschew: I don't want to be a prick, but the best thing for you to do is pick one of the many step by step options we are giving you and just do it. You are overthinking this way to much. I understand tht you want to learn and that's awsome I'm a strong believer in the "Teach a man to fish..." theory but at this point it's important that you keep it simple. If you run across a problem hit us up. If you would like ill give you my e-mail or cell numbr and you can txt me with any questions.....
As I said before disconect the battery before you start and you can't really mess anything up. Good luck my friend
Well, the offers there if you can find some time. I'm better at testing and building hands on than I am at telling other people how to do stuff. I can test it with my DMM, twist some wires and make sure its working correctly, then solder it up quickly. IDK what other advice to give, Ill just wait for questions as you go.
I even have new connectors in my toolbox, no $20 minimum![]()
Collin, can you verify that your factory turn-signals have the connectors shown below?
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http://lh3.ggpht.com/_eAGqfR6FyjY/SVZ5IS2_McI/AAAAAAAANxs/TqwbZipSoqM/s800/IMG_0816.JPG
You have two coloured wires on each of the 2-pin connectors and a green wire on the 1-pin connector? Can you take a close-up picture of the connectors? I'm going to have you make an adaptor harness for each side. On one end, it will have a set of plugs that connects to the factory connectors. On the other it, it will have two sets of plugs, one for the mirror light and one for the flush-mounts. That way, you can disconnect either one easily and no hacking of the factory wiring needed.