1972 B-Body with standard gauge cluster.

My temperature gauge decided to quit work. The needle stays to the left at cold no matter how warm the engine gets.

I replaced the temp sensor. I also inspected the board at the back of the gauge pod and there was no visible defects. My engine harness is a replacement from Year One and is in excellent condition.

Are the gauges themselves known to go bad? I noticed the light bulb on that end of the cluster doesn't come on with the headlights. I haven't pulled the bulb yet to see if it's burn't out. Likely just a coincidence and not related.