Welcome to the forum and irv2 Dawn.
To start here is a
Brochure and
1997 Owners Guide the oldest we have.
Below in my signature are links that some will apply to your older coach.
This link should be helpful.
If your batteries are fully charged or the coach is plugged in the 12v supply should provide the voltage needed to operate your lights.
Have your coach plugged into a power outlet to operate your slide, weak batteries will cause you slide problems.
In the OG their is wiring and fusing diagrams and you may have circuit breaker's off your house batteries that have to be reset for operation of your 12v control boards and lights. Page 7-7 will show what I am talking about they would be near the house batteries.
The battery disconnect switch should be on at all times you are using your coach.
Your in WA. state
this company maybe able to help you out if you have problems with the coach.
Congratulations on your Newmar, enjoy the forums and do post often and safe travels.