Question about 1989 Chevrolet Corsica

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Help with troubleshooting speedometer problem. I had a "friend" do some work on my car a while back and ever since then my speedometer will just start jumping from 0 to 10 to 80 to 60 back to 0 at random. It jumps all over the place. Even in park it does this. When it does it going down the interstate it comes out of the torque convrter lockout. So I figure the speed sensor is going out in it. Replaced that and it's still doing it. Well I unplugged the sensor and it is still doing it. I dont think its the cluster. Any ideas where to look or possibly a wiring diagram?

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  • cibersnyper May 10, 2010

    This car has an electronic speed sensor. And the transmission was not moved. Replaced the oil pan gasket and trans gasket and filter.

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I had the same thing go wrong my buddy did not tell me that he droped the thans to the ground befor he saw that the speedo cable was not unbolted, I found out that he had STRETCHED the cable.
not much but that was the problem,

Posted on May 09, 2010

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