This is an interesting one. The customer would randomly get a communication fault on his Firefly Integrations Multiplex system. You won’t believe what we found. This guide walks you through testing of the CanBus system and what we needed to do to repair the problem. It is an essential guide for Firefly multiplex troubleshooting.

Quick Note- Can Hi and Can Lo are the blue and white wire. These are the communication wires we are testing.