Did you unscrew or remove anything in the cluster? There's a wire that runs across the middle that connects the left and right side gauges... maybe it got dislodged and is making contact elsewhere... I do not remember if its positive or ground though

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project