Today i got some LED turn signals.  No instructions.   China....   i would like to do a bench test.  Anybody have any ideas about how to connect these up.  Black is ground.  Good start.  Next....
I don't want to just start putting power to them.  I hear these LEDs can be sensitive to power not going the right way.
Two... $15.49. These look pretty good.   The Chrome is good qualit, not great . Some scratches. The first thing I don't like is there doesn't seem to be a cover over the diodes.  
The second issue..... look at the second photograph it looks like somebody glued in the LED assembly a little cockeyed.
Do you think these came with the resistor in the circuit?
Any thoughts on testing would be appreciated.
John 


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