[techhelpbb]

I am suspicious of something and I'll share it here merely as speculation until I can prove it.

If you look at the schematics of the Jaguars (both models) you'll note that in all cases virtually every single interface on the Jaguar reference either both their internal ground...and one of their internal power supplies, or just ground.

The exception to this rule is the PWM input...which does in fact have a logic level optoisolator.

Now...the people using PWM don't read errors out...but in using PWM they are isolated from the Jaguar's internal power supplies entirely.

Anything you put on the Jaguar other than that input has the ability to directly impact the internal power supplies...and unlike the input power to the Jaguar which is heavily filtered because of all those power supply circuits...you'd be impacting in some cases the very same power that runs the Jaguar's microcontroller...and provides signal conditioning for it's analog to digital circuits.

I think this is the sort of thing that could explain why...when people hang even modest limit switches off the Jaguar...odd things can happen...but don't always happen.

Further...CAN is a robust bus...but if the circuits within the Jaguar's suffer from a power supply issue...these issues might translate into things like CAN timeouts.

If you think about it...you are basically putting a long antenna on the Jaguar's internal power supply whenever you connect a sensor.

*I am merely speculating.* I am awaiting the opportunity to test this. I am also accepting the possibility from other posters in this topic that...at least in the case of our issues...it might be a wiring problem.