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Discussion Starter #1
guys I need your help, my enclosed trailer lights are not working, but my electric brakes do work. Im pretty confident the trailer is fine, about a month ago I moved it with my brothers truck and the lights worked fine on the trailer then. I dont have a owners manual to look up fuses for 7pin harness fuse. Any ideas what it could be?
 

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So do all your running lights work? I assume what your saying is the interior lights in the trailer dont work. I also assume the trailer would be wired to feed off of the Trailer tow-Battery charge circuit on the 7 pin.

Every trailer circuit has its own fuse, the fuse your looking for will be in the Battery Junction Box under the hood by the battery. Either beside the fuses or on the fuse box cover the fuse numbers will be labeled. Look for fuse #44 it should be a 30amp fuse.
 

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Discussion Starter #3
So do all your running lights work? I assume what your saying is the interior lights in the trailer dont work. I also assume the trailer would be wired to feed off of the Trailer tow-Battery charge circuit on the 7 pin.

Every trailer circuit has its own fuse, the fuse your looking for will be in the Battery Junction Box under the hood by the battery. Either beside the fuses or on the fuse box cover the fuse numbers will be labeled. Look for fuse #44 it should be a 30amp fuse.
no running lights do not work.
 

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ok BRB
 

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The running/park lamps is in the same fuse box, the fuse number is #42 & 30amp, If you dont have spares and are not using the circuits mentioned above on the trailer i would use fuse #44 for spare
 

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Discussion Starter #6
The running/park lamps is in the same fuse box, the fuse number is #42 & 30amp, If you dont have spares and are not using the circuits mentioned above on the trailer i would use fuse #44 for spare
ok will check in the am to see if thats the issue! :salute
 

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If im thinking correctly those fuses are the wierd looking ones with the window on top. You may want to remember to buy spares to keep just in case. I also usually put a paint pen or magic marker dot on fuses like these to make them more noticeable since they tend to pop more often, It makes them easy to find in the dark too.
 

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Discussion Starter #8
fuse # 42 and 44 are both blown. Where can you get these type of fuses from? What would make these fuses go out?
 

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did you plug the tralier in with the lights turned on?
 

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Those fuses are dedicated for the trailer/wiring. I would unplug the trailer and replace the fuses, If the fuses blow with the trailer disconnected you have a short somewhere on the truck. then plug the trailer in and turn on the lights and see if it blows again if fuses blow now the problem is in the trailer. Should be able to find those fuses at a local auto parts store, get extras you will probably need them.
 

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some people have had problems with the fuses blowing when plugging the trailer in with the truck lights on, I dont know why but that could be your case too.
 
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Discussion Starter #13
some people have had problems with the fuses blowing when plugging the trailer in with the truck lights on, I dont know why but that could be your case too.
really? Thats odd, must be different then the 05 and 06 trucks then. I will pick up some fuses and see if I can get it to work. Thanks for all of your help. Cant believe no one else even commented on this thread.
 

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Discussion Starter #15
maybe you need to go back & read it then. there were two other members who replied.
your right:damnit, I dont know how I missed those posts....thanks guys

I will get some of those fuses tomorrow and retry the trailer.
 

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Discussion Starter #16
replaced both fuses and now running lights are working perfectly....thanks for the help guys!
 
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