The back up tender light on my Lionel Legacy 1225 Pere Marquette continuously blinks
Lionel suggested I wire resistor number 691R450200 in line with the led
My question - do I need to be concerned with the polarity of the led or do I just splice into either wire going to the led ???
The engine is number 11146
Thanks in advance
Joe S
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Can't answer your specific question though on my signals the resistors are in either leg, anode or cathode, no pattern.
LED does not care what leg the resistor goes to.
Just stick it in anywhere, no polarity on the resistor, and as Ron says, either lead will do the trick.
Thanks guys - really appreciate it
Fathers Day project - wired Lionel $.30 resistor to LED back up light on my Legacy 1225 PM Berk - works perfect 
Thanks again to everyone
Boy, you got ripped at 30 cents, they're normally around a penny. 
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