<<< ( or am i not understanding what you are saying?)
wiring the lights isn't the problem, finding a bulb holder is the problem/confusion the holder that goes into the side maker has a 3/4inch(?) hole and 4 indented "turny" thing the turn signals under the head lights are at least 1 1/2 inch and allow for the 2 stage larger bulbs. and this is what the problem is.
You are not understanding what I am saying. but I may not be explaining it clearly either.
The approach you are trying to make is to fit a dual filament bulb and holder into the small side marker. I bounced my head off the proverbial brick wall trying to figure that out as well. I had almost decided to build custom markers using LEDs and a modified housing, but shelved that idea because I kinda need to get the truck running before I worry about modifying the lighting.
What I am suggesting is that instead of installing a dual filament bulb, make the single filament bulb that is there do two jobs. Trailers do this all the time. In most trailer tail lights a single filament does the job of both turn signal and brake. Many vehicles with separate turn signal and brake bulbs in back need a 3 to 2 wire tail light converter to make the trailer lights function properly. This takes 2 turn signal wires and 1 brake light wire, and converts it into the 2 turn/brake light wires needed for the trailer. I'm saying that you use one of these and connect the Running Light (AKA: Side Marker Light) wire in place of the brake light wire.
Here's a converter like I'm talking about (pic links to Amazon page):
Here's some examples of others that have used this style set-up for the same purpose.
Pirate4x4: How to trick a one wire marker light to work as a front running light AND turn signal
Valkyrie Riders: Saddlebag Marker/Signal Light
Installing run/turn lights into a saddle bag is how I originally came across the idea. Never did it and never thought about using it for the side markers on a Ranger until I read this thread, but it should work.
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.....well i think it is...
