Question about 1993 Buick Roadmaster

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I have a 1993 roadmaster. my speedometer and tachometer both stopped working at the same time. every now and then they'll come back on for a short period.

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You have a short somewhere between the ECM and the dash cluster. most likely the connectors to the dash cluster have backed out. Take the mounting screws out and remove the cluster from the dash. Check that the connector is completely seated on the prongs in the back. You may want to clean the prongs off with a dielectric cleaner. Mount clusters but only put one screw back in. Test drive and see if problem reoccurs. If not the prob is fixed. If it doesn't fix it, get w/ a dealer and replace the wiring harness between the ECM and dash cluster. Good luck

Posted on Mar 08, 2009

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