Strange electrical problems (intermittent)

[JPA]

My 98 EB has a wierd electrical promlem. The fm-am/cassette/cd player looses part of the voltage that illuminates the Radio section. I cannot tell what channel or cd/cassette track is playing. The controls are lighted, just the section that tells you what you're listening to is not lighted. This is an intermittent problem. It does not work more than it does work. Will work for about 10 mins the it stops working for weeks.
Does anyone know where I can find the electrical wiring schmatics?

 

[Eneurb]

It's a problem with the circuit board in the radio. Search the topic and you'll find lots of information on it. I chose to remove mine and have an electronics shop fix it.