What does it do when you plug it in? Do you have power and ground at the
proper pins (Should have a good ground at pins 4 and 5 and battery
voltage at pin 16) If you don't have battery voltage at pin 16 check to
see if the lighter socket is working. Could be a blown fuse and they are
usually on the same one. Lack of ground would be a wiring problem.
IF you have a good ground and power then I would take it to a place like
AutoZone who will usually scan them for free. Have them plug in their
scan tool and see if it works.
I went with Car codes program for a laptop several years ago. www.obd-2.com
With the full CAN kit I can access all the modules, IE abs, bcm, security,
Was the cheapest option at the time and works just fine on my '99 Yukon and
my other vehicles.
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