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Old Mar 3, 2014 | 09:18 PM
  #1  
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blown fuse Pl

I am having a problem with trailer lights and an 03 350. When the truck is in reverse the fuse for travel trailer running lights and tail lights blows immediately. Changing plugs on thetruckdid not help. Truck has been hooked up to 4 other trailers including another travel trailer with no problems. Our travel trailer has been hookedup to an 08 and a 2011 truck with no problems. Can s
omeone please help? Fuse 38 20 amp. 7 post rv plug.
 

Last edited by vandiversteve; Mar 5, 2014 at 12:03 PM. Reason: add additional info
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Old Mar 4, 2014 | 06:42 AM
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Identify the specific fuse by its location. See owner's manual.

Does the TT use the four or seven pin plug?
 
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Old Mar 8, 2014 | 10:17 AM
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blown fuse.

Will try this again. I have a 2003 f350 and a 2010 Keystone ultralite travel trailer. When hooked up the fuse ( 38; 20amp) for trailer running lights and tail lights blows immediately when the truck is put inreverse (fromeither direction). As long I can avoid reverse no problem. Trailer has been hooked up to a 2011 f150 and a 2008 f350 with no problems. F350 in question hasbeen hookedto 5 other trailers (2 travel trailers) with no problems. Tt has 7 pin rv plug. Changed plugs ontruck did not help. So far thishas everyone stumpedbut surely someone can shedsome light on this. Please.
 
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Old Mar 8, 2014 | 10:45 AM
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blown fuse.

Will try this again. I have a 2003 f350 and a 2010 Keystone ultralite travel trailer. When hooked up the fuse ( 38; 20amp) for trailer running lights and tail lights blows immediately when the truck is put inreverse (fromeither direction). As long I can avoid reverse no problem. Trailer has been hooked up to a 2011 f150 and a 2008 f350 with no problems. F350 in question hasbeen hookedto 5 other trailers (2 travel trailers) with no problems. Tt has 7 pin rv plug. Changed plugs ontruck did not help. So far thishas everyone stumpedbut surely someone can shedsome light on this. Please.
 
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