Last year my speedometer stopped working. Just stopped. My mechanic said, "it's the cluster". New one is $700, used one is $350 - buy with used you might be inheriting someone elses' car problems. Who knew?
So tomorrow morning, I'm going to find out. It's a diagnostic. Pray that it's the thermostat, because they are $19.00 which is about what I have left for July. Ha!
You gotta laugh (or slit your won throat - right?)