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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

'95 Ford Contour, No Speed-O-Meter

Q: I drive a ‘95 Ford Contour SE. My speedometer stopped working one day and hasn’t moved since. I was wondering if you could tell me what the possible problems would be and if I could fix it myself.

A: Starting from the late 80’s and moving into the 00’s vehicle computers have become very dependent on vehicle speed information. So dependent that vehicle speed information will go to the engine computer before the information is sent to the speedometer. With this in mind if the vehicle speed signal is lost, the engine computer would quickly complain and turn a check engine light on. How can you be sure what component really needs service? Have a repair facility plug their computer scan tool in and check the vehicle speed sensor signal to the computer. If the signal is present then it’s possible that the speedometer has failed. Can you repair it yourself? Yes, but the next thing you need to know is if the speed signal is getting to the speedometer. If the speed signal is being sent and received by the speedometer then the speedometer needs to be replaced. It’s just not as simple as it use to be.

 
     
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