I had to remove my instrument cluster to repair the odometer gear that had slipped off the shaft. For some reason my oil pressure and tachometer are no longer functioning after I put the cluster back in. The pressure gauge is sitting at zero whereas the tachometer seems to sit between 1000-2000 rpm while driving no matter what the speed may be and at only around 500 rpm while idling. All the connectors are seated snugly to the panel. Is there something obvious that may have been missed?

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1989 300CE