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Old 10-14-2012, 07:45 PM
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sometimes the wiring in the trailer can be different than the vehicle towing it
wires need to be switched in the trailer pigtail to match the towing vehicle

best way to check the tow vehicle female pigtail is to turn on the ignition,
then find your pin with the power source, using a device like this
http://www.amazon.com/Tools-KDT129-V.../dp/B000K1CHK0


grab a pencil or pen & a piece of paper, you are going to need to draw a diagram of the towing vehicles pigtail

1 of the pins should light up, your license plate light should also be working if the light switch is on, mark which pin is the hot one

then you can turn on your turn on your Left turn signal & find which pin makes that work
mark that pin on the diagram

continue trying different things & mark them down if it works

when you get to doing the Right side, do the same tests

that will tell you if you have power to both sides
if you do, it is something wrong with the trailer pigtail or the bulbs

common pigtail diagrams
http://www.etrailer.com/faq-wiring.aspx
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Last edited by GTyankee; 10-14-2012 at 07:51 PM.
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