replaced PCM, now speedometer doesn't work
#1
replaced PCM, now speedometer doesn't work
I replaced the PCM in my sister-in-laws 95 Bonneville with a salvage yard unit and now the Speedometer and Odometer do not work. Is the replacement unit faulty? Or did I pull a wire loose during installation?
#3
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swap the original back in, see if it fixes it. if it does, the replacement is junk. the odometer is driven off of the speedo signal anyway, so it'* likely the driver in the PCM for the 4K PPM signal died.
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