Nate do this test and report
1. Test the CAN high speed high and low signals with a scope or a Digital Volt Ohm Meter (DVOM), pins 6 and 14 of the Data Link Connector (DLC).
2. Should have a 2.5 V to 3.5 V square wave on pin 6.
3. Should have just over 2.5 V with a DVOM on pin 6.
4. Should have a 2.5 V to 1.5 V square wave on pin 14.
5. Should have just under 2.5 V with a DVOM on pin 14.
6. Key OFF for 1 minute or more.
7. Ohm test from pin 6 to 14 with an ohm meter.
8. Should have close to 60 ohms, common to see near 64 ohms.
Brad