1985 pontiac grand am. speedometer is pegged to 100mph at all times. Any ideas?
Speedometer is not functioning and the needle is pedded on 100mph even when the car is turned off. What could be the possible problems?
Sounds like a broken or seized speedometer cable. This will require disassembling the dash to get at it. The cable is not an expensive part but the labor involved is usually fairly time-consuming.
the whole instrument cluster comes out in one piece I have a 85' and it's electric no cable ...so i think maybe pull it out maybe clean the connections or look for a relay ,fuse.,Also you could just find another cluster at a salvage yard ..
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