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Old 04-19-2012, 12:39 AM   #3 (permalink)
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His signal is good, since his speedo still works.

You need to trace your vss input on your 'guino. Turn the ign On, and slowly roll the car, while probing the vss input voltage. When it hits 12v (or whatever "High" is), stop the car & check voltage after the resistor. If it never hits "High", then your input wire got disconnected somewhere.
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