Passenger tail light works occasionally, brake light works and so does blinker, but night time light so,so, pulled bulb and reinserted, works fine, go drive at night no light, bang on side of truck, still no light, went and got a new pigtail socket, swapped out, bulb still no work, pull bulb reinsert, works fine, figure its bulb, get new bulbs, same crap, now I am thinking its the frt control module, but its only one tail light, might just rip out parking wire and splice it into the drivers side parking light, or even some how splice into the fuse box with a jumper between the two, any other ideas, or should I spend the 300.00 on a new complete fuse box

 

I would just spice it into the pigtail for the trailer lights that may solve your problem

 

I would start with splicing into the trailer lights pigtail if you have one.

Might just be the bulb socket being loose, or **** poor manufacturing of the light bulb socket.

Try some Dielectric grease on the bulb sockets and connections.