This is my first post...I hope someone is familiar with my electrical problem. I have a '91 Sovereign that I purchased from the original owner. It now has 87,000 miles. Recently, my dashlights (warning, speedo, etc.) all started randomly flashing on and off. They basically light up like they would when first starting the car and then go off; the speedo and tachometer go on and off too. Sometimes they repeat 10-20 times. It makes no difference if the headlights are on or not. My Jag mechanic is stumped! He already tried replacing the entire instrument cluster (?) and it made no difference so he put mine back in. He also replaced the unit inside the headlight switch. That didn't help either. Although I doubt they are related, just before this started, I did a major tuneup and a valve job. Any ideas would be appreciated!

 

I hope its just the battery for your sake...lol. Always look at the cheapest solution first such as the battery as mentioned! It's weird..who knows what causes random stuff like that..my Jeep used to go haywire like that every once n a while too.