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Old 11-01-2010, 09:47 AM   #3
TomC
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Default three things to check

one - there is usually a junction or control box at the tongue near the battery that runs the break-away brake. Check that the interior light wiring is connected to the appropriate terminal (and that terminal has power).

two - if there is an internal switch for the lights - make sure you know that it is on (both my horse and snowmibile trailers have this).

three - make sure that the truck lights and/or accessory position is selected or 'on' if either is needed to run the lights. My snowmobile trailer (Kristie) requires that the parking lights be on for the interior lights to work and the horse trailer (CM) requires at least the accessory position on the ignition switch.

i'll bet one of these is your problem.
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