With the advent of cooler weather, my speedometer has become intermittent. It refuses to work when the air temperature is below 55-60. After about 10 minutes with the heater on, it suddenly springs to life. After that, it will continue to work after stopping and restarting for the rest of the day unless the car sits long enough to cool down completely, then the warmup cycle repeats.
I suspect a bad solder joint on one of the connections at the rear of the cluster. Any suggestions on where to look, and how to identify which one is the problem?
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