Speedometer not resetting after cruise is off

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Speedometer not resetting after cruise is off

Unread post by GUEST » Thu Jun 27, 2019 2:01 pm

2005 Buick rendezvous- cruise set at 70 and speedometer reads 70; cruise turned off and speedometer remains set at 70 but speed is lowering. Even when engine is off, speedometer reads 70. After resetting with the switch several times, the speedometer will eventually adjust to 0. What’s going on?

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Re: Speedometer not resetting after cruise is off

Unread post by carriedi » Fri Jun 28, 2019 12:29 am

sounds like the stepper motor for the speedo is sticking. All the gauges that use the needle to point to show you what is happening are little stepper motors. They are electronic pointers controlled by the instrument cluster. They can stick in place, the can loose their zero point and point in a totally wrong position. Or stop working altogether. A scanner might be able to scan for codes and see if there are codes for the speedo. The scanner should be able to run a sweep test and see if the dials move all the way up and then all the way back down. It may pass the sweep test if the condition is intermittent. The stepper motor is soldered into the circuit board. Most shops won't solder in a new one. They will recommend it be sent out and rebuilt (replace all the stepper motors and light bulbs (since the light bulbs are soldered in also) depending on the rebuilder).

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