No tail lights??

[Mayo07J]

I have a 2000 F350 PSD. I noticed a few days ago that I do not have any tail lights when the parking lights are on. The front lights all work, but the tails do not. Brakes, 4-ways, and blinkers are all good, but the tail lights aren't. I have checked the power at the light, and am not getting any juice. Also have checked the fuses, which appear to be OK. I do not have to owners manual, so can anyone tell me which fuse to look at, or how to fix it?

[Mayo07J]

I went and fiddled with the wires again, and for some reason, they work. What's up with that???

[pojo4223]

may be a bad connector at the bulb? pins may have a bad connection with the running lights? not too sure, some one may have had the same problem let us know how you make out