Mystery of blowing fuse resolved
The 15 amp fuse that protects the interior lights and exterior porch light along with the light under the steps of my 2017 265RLSW would blow intermittently. Completely driving me crazy because it was not a constant fault. Difficult to impossible to troubleshoot a potential short when the fuse was not blowing. Isolated it on a camping trip to the porch and step light; flip on the outside lights, fuse blows taking out living area lights as well. Kept the outside lights off for the trip and when I got the trailer home, no more blowing of the fuse and the outside lights worked perfectly.
Made a trip to Disney, no blowing of the fuse, bring the trailer home and finally the fuse blows at the house where I can isolate it. I’m careful not to disturb any wires while figuring this out; certainly don’t want the fault to go away. With the light switch off, I disconnect the connectors at the step light and read resistance between the wires supplying the power and return and perfect, I have a dead short. I follow the green 12VDC wire back and it was running under the bracket on the side of the fresh water tank. I remove the bracket and the wire is squeezed flat and right where it came out from under the bracket I saw exposed copper. Finally I had found the interment short.
Looking closely at the exposed copper, several strands were broken so I cut out the damaged area and put an inline splice, soldered it up, slid some heat shrink tube over it and problem solved. All the lights work, no more blowing fuses and the short is resolved. The bracket is not a support for the water tank but rather a positioning bracket to keep the tank from sliding around. Obviously I reinstalled the bracket without the wire running under it and to the side where all the other wires are running.
Just figured I would pass this discovery on in case someone else was battling with something similar. Wouldn’t be a bad idea to roll around under your trailer and look to make sure you don’t have any wires pinched between a bracket and the frame. Other discovery’s were wires running through bare holes in the frame, I use a small piece of heater hose, split it down the side and zip tie it so the wire insulation is not rubbing on the metal hole. It would probably take years of travel vibration to wear through the wire insulation but nothing wrong with some homemade grommets. The picture of the bracket is after the repair.
2017 Jayco Jay Flight SLX 265RLSW
2016 Chevrolet 2500 Silverado Duramax Diesel
Equal-i-zer WDH, TM55cB TPMS