It's for a 5v system. If your OBDII puts out a constant 5v, you leave the jumper in and dont wire the 12v signal. That may be your issue. I needed the 12v. Try running it with the jumper and without the 12v.
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03-28-2012
It's for a 5v system. If your OBDII puts out a constant 5v, you leave the jumper in and dont wire the 12v signal. That may be your issue. I needed the 12v. Try running it with the jumper and without the 12v.
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