Are the power supplies getting replaced like for like?
The oem ones I think are 28 amps
The cheap replacements come at like 7 or 8 amps
We found this too be a problem when a car would go down and switch dispatching roles .The car with generic power supply would reset similar to your issue. The current output just wasn't enough to handle the load . Is the car using fiber optics on the pulse wheel ?
Yes, it's using fiber optics on the pulse wheel. He replaced the fiber and the heads not all that long ago for a different problem.