Our '99 Montana has a VERY intermittent problem. In the 3 years we have had the Clock/ Radio station LED the overhead control fuel mileage, compass etc. illuminate only about 5-6 times, but only for a short period of time (minutes) I can see when the sun hits the radio LED "just right" I can see that it is showing the clock/ radio station. The rest of the radio lights do come on with the headlights OK. I have removed both the overhead display and the radio and it appears that we have power and ground. Do these 2 components work in conjunction? Since this is an older vehicle, I prefer not to put too much money into it, however if it is a simple fix it would be nice to have working. Thanks