My misunderstanding..
I designed a simple circuit for motorcycle two wire LED turn signals.
The same circuit would work for the side markers lights.
The circuit is nothing more than two diodes and a resistor.
Since the side marker lights are only two wires - 12V & ground this would work for what your trying to do. (side marker lights as running lights & turn signal)
You would basically feed the turn signal lead into one input (diode only lead) and the parking light lead (running light) into the other input. (diode with resistor)
The single output lead would go to the side marker light. plus the ground wire..
All the parts can be acquired from RadioShack. Simple to build, I used heat shrink tubing to enclose the components.
See drawing of the circuit below.
Your biggest challenge would be taping into the turn signal lead for each side.
You would need a total of 4 diodes and 2 resistors. RadioShack part numbers provided.
Hope this helps
T
