From an electrical point of view, a short is extremely unlikely as it would just blow a fuse and stop working permanently. A more likely scenerio is that something that supplies power to the cluster is going open curcuit intermittantly. I once had a problem with the blinkers and electric windows and air-con intermittantly stop working, and the fault never reoccurred simply by moving, or reseating as I call it, all the fuses and relays in the fuse box that in hidden under the battery holder shelf in the motor compartment.
Brian
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