i have a 1996 jeep grand cherokee with the towing package. the stock connector for the trailer wiring is an "RV" type. link for what i'm talking about . i bought an "rv" to four conductor adapter a while back so i can use it with those standard flat connectors for trailers. it's worked before, but today i tried it and the damn thing is broke. there's voltage at the terminals (says my voltmeter), but it just doesn't light up the test light or the trailer lights. i even checked every single fuse, just to rule that out. anyone know what may be the matter? i did a search at jeeps unlimited and didn't find anything that helped.