[Jackpine]

Mason, if Pegasus is able to communicate, I can't see that your Gryphon is damaged. But, I suspect it's not booting properly due perhaps to the cold and, a low battery condition.

Starting the truck in extreme cold after it's been sitting a long time will almost guarantee low voltage during the start, which makes the Gryphon think it's been unplugged. Then, when the truck starts, since it's already plugged in, it doesn't reboot.

Now, you said you tried the various plugin combinations, but was the Gryphon warm or was it still cold soaked?

If you haven't tried it already, keep the Gryphon inside the house overnight to get it nice and warm. And, if there's any way to do so, have your battery tested. It should show a no-load voltage of about 12.7V if it's fully charged. A load test is best to determine condition. With the engine running, a voltage test on the battery terminals should show 13.8-14.2V if the alternator is good.

Anyway, with a good battery and the key ON, try plugging the Gryphon in when it's all warmed up.

And just to make sure you checked the proper fuse, does the cigarette lighter still work? If it doesn't, the OBD fuse is blown.

Maybe, since you have an older truck, the OBD cable itself needs to be warm too. There are electronics in the plug end.

- Jack