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TPS issue doesnt explain the Instrument Cluster problems. Running the battery down listening to the radio and zapping the last bit of usable life out of an assumed older battery explains it all. Dead/Weak Cell in the battery.honestly to me sounds like it may be tps issues ( very common, also commonly results in reduced power issues)
I’m not sure what happened with it tbh! Batt tested good, by the time I got to the shop but before I got everything out to start testing anything and everything I could think of, everything went back normal op! I haven’t done anything since except drive it and nothing has presented itself nor has a single symptom returned.Load test your battery and if it turns out ok look for a corroded, loose, open ground connection. Instrument cluster problems fit a battery with a dead/weak cell. Problematic grounds can cause havoc though too.