On my 96 F250 with a 351 I have no turn signals,no brake light,no backup lights,no four flashers this happened awhile back and I changed out the turn signal assembly and it fixed it and now it is out again so I got another switch from another parts store and it hasnt fixed it and the wipers do work and the headlights and park lights work. Is there some other breaker that might be bad? I have checked all the fuses and they all have fire in them. Any help would be appreciated.