I tried driving in the a tstorm without the top on, (got caught on the road). It did not work to well. The YJ should be fine if it does get wet on occasion. I did have to repair the circut card behind my gauges a few years ago though. The previous owner must have let it get wet quite often. Some of the runs on the card had corroded. I ended up having to make some electrical jumpers and solder them over the corroded areas.