Randomly this weekend our rig started having an intermittent charging system fault. The alternator was replaced about 1.5 years ago with an OEM unit. I checked the voltage and both the battery and alternator seem to be working in spec. Pulled codes and these are the following. P0A1A-87 - Generator Control Module - Missing message P0A1A-88 - Generator Control Module - Bus off After finding these codes and reading this thread, I decided to check all the wiring on the positive terminal. Everything looked great. No burnt or loose wires like he found on positive. Also checked the entire negative area and BMS. Looked good. I could buy a new negative cable and BMS and try that. Any thoughts?