The resistors are not needed for your trailer. If you we're converting your tow unit you would either need to use resistors or purchase a digital flasher. The reason being that LED's do not draw enough current to make a standard flasher flash.
Edit. I should add that the extra load the LED's add to a tow units's circuit is usually not enough to require a heavy duty flasher that is normally needed when using incandescent bulbs. This is what causes the SLOW random flashing upon plugging in the trailer. Most places (not all) when adding a hitch to a vehicle will change the flasher to a heavy duty one. Factory tow packages also include a heavy duty flasher.
Last edited by desertdueler; 10-27-2013 at 09:02 AM.
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