You don’t say if this is a new problem that you never had before? Did the system work correctly and now you have an issue or is this a new coach? My BIRD was also wired incorrectly at the factory. The wire to the coach batteries went somewhere - just not to the coach batteries. After cutting that wire from the BIRD and rerouting it to the coach side of the Trombetta (with an online fuse) it worked perfectly. There have been numerous reports of misfired BIRDs.
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