1997 Olds regency will not start all the time. When it does this it kill some of the lights on the dash but not all lights. Have cleaned battery connections and changed starter solenoid.?

The intermittent starting issue in your 1997 Olds Regency, coupled with the dashboard lights dimming, suggests a possible electrical problem. It could be related to a weak battery, faulty ignition switch, or poor ground connections that may not be fully resolved by cleaning the battery terminals. Additionally, check for any loose or corroded wiring in the starting system and ensure the battery is holding a proper charge. If the problem persists, it may be wise to consult a professional mechanic for a thorough diagnosis.