Tail light fues keeps blowing on a 1993 landcruiser

First, be sure you are replacing with the correct bulb and correct fuse. If so, you must have a short in the circuit. A short is a place where the wire touches the car frame or bulb socket or some other metal part. If the fuse blows instantly it is likely a direct short. Check the wires where they connect to the bulb socket and any place you see them to see of the insulation is damaged or missing. This is especially true of any place where the wire move or can rub on something. A short can come from only one small strand of the wire touching metal. It is difficult to trace the entire wire because it is in places that may be hard to see. Somewhere in the system there is a short or something that causes the fuse to blow. If you have modified the lights for a trailer or some other item that adds lights that also could be the problem. More lights use more current and may be more that the fuse will allow. DON'T REPLACE WITH A LARGER FUSE. THAT CAN CAUSE A FIRE. Good luck.

Thanks for using FixYa.
Gaker