What makes a 2008 grand marquis speedometer jump

Asked by Feb 04, 2018 at 11:48 AM about the 2008 Mercury Grand Marquis

Question type: General

1 Answer

80,405

There's no speedometer cable. It's most likely the wiring going to the instrument cluster. There's a known issue with this. The wiring going to the cluster gets pinched and causes problems. The steering column has to come out to fix it. HTH. -Jim

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