rear fog light not working

[krynac]

hi I have a rear fog light fitted on my 86 westy to UK requirement which used to work. I have had the dashboard out to do another job and had to unplug all the wires to do it.When plugging all the wires back in I think I have put the wires back wrong and in doing so may have blown a fuse (WOULD IT BE FUSED?) is my question or have I just got the three wires wrong way round, I have tried them in about every different orientation possible.
Thanks