why does my 99' l Dodge 3500 5.9 cummings diesle break fuse keep blowing

 

pull all bulbs out of back of truck inc. back up lights and retry if still blowing check wiring under back of truck and to trailer plug (if installed) and look for chaft wires or rubbed through wires follow back up frame to check. also check where wiring goes over frame under dr door and up firewall good luck

 

wher i found a problem was the routing on trailer brake wire in cab under pedals had rubbed against the pedals check wher it was routed hope you find er.