Well since no one seems to be touching this one.......as yet. Can I “assume” that your toad wiring is as shown in the attached schematic? If yes, then wiring should be straight forward and it sounds like you have had it working ....for a while at least, each time you replace the fuse. So it sounds to me like an intermittant short to ground somewhere in either the left or right signal/brake cct, as a first guess. So I would recheck those signal/brake wires at the coach trailer hitch terminals and at the toad front hitch terminals as a first check. If the problem occurs while travelling then perhaps there is a termination that randomly grounds out in turns/flexing etc. Failing that, perhaps one of the toad signal/brake feeders from front to rear lights/diodes has been cut or skinned passing through the toad body somehow?
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