Pull the Instrument panel(IP). unplug it, then plug it back in. See if it comes back to life, corrosion. If not, replace the IP. Year make and model helps.
SOURCE: electrical fault
It could be lamba sensor in exhaust gone faulty you need to get it on a diagnosic com puter really to check as modern engines have lots of sensor to monitor air fuel temparatures etc most garages have them now as all cars have electronic control units to control the running of the engine
SOURCE: rev counter, speedo & sometimes fuel & temp guage not working
pull the instrument cluster out and check the printed circuit and connector to it from harness, plug it in and out three or four times, this may cure the problem.
SOURCE: speedo works sometimes and doesnt work sometimes?
It sounds like your cable that goes into your cluster may be loose.Reach under the dash in the foot well and jiggle the wires.Then you can see if this makes a difference and you will know if it is this.Otherwise,it could be your speed sensor that goes into the tranny.Hope this helps.
SOURCE: The instrument cluster on my 96 volvo 850 AWD has
well the good news is this is not common with the volo
however, the bad news is the company that made this cluster is the same one that made the continental which had lots of problems
since there is no one power or ground for your cluster it is VERY likely that the computer inside the cluster has failed
in order to diagnose, you will need a professional scanner
please see your dealer or a VERY GOOD independent garage
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