Re: Mecanum forward rotation error
 

If the fuse is good, unplug the white connector and use a voltmeter to check if there's voltage at the connector, with the correct polarity.

Re: Mecanum forward rotation error
 

How do we check if the fuse (it's really a circuit breaker, right? I mislabeled it?) is good? I'm also signing off now, I'll be back tomorrow evening.

Re: Mecanum forward rotation error
 

Just swap it out for a known good one.

If that doesn't work, then disconnect the white connector at the sidecar and check to see if you've got voltage coming out the end of the cable.

Re: Mecanum forward rotation error
 

So it isn't the wiring as far as we can tell. We replaced the wires and used a new 20A breaker, still no 6V light. We are getting 12V at the end of the cables connected to the PD board. The DB-37 cable keeps the 5V light on by itself, and the WAGO keeps the Bat light on. Both of them together will turn on the RSL. The 6V light would come on when we used a new sidecar, so since the wires were capable back then I believe they still are now. When the sidecar broke, the only change was that in the situation in which the disable would occur, we were able to run the motors in that situation for a few minutes while all three lights were on, and then the jaguars disabled themselves and we noticed the 6V had turned off. So I don't think it is the wiring since it was capable of running the robot and the sidecar before it broke. Something physical changed when everything stopped working, and my guess is we broke the sidecar, but what we don't know is how sending four -1 PWM signals killed it.

Re: Mecanum forward rotation error
 

My best guess would be a small metal shaving shorting the 6v supply. It could have worked its way into a bad place over time. Look in the area of the PWM connector/servo jumpers.

Re: Mecanum forward rotation error
 

I didn't see anything but a bit of dust at the very bottom, and we've switched out two sidecars already in the past couple weeks.

Re: Mecanum forward rotation error
 

It is solved! It turns out that though nearly all documentation requires a 20 amp circuit breaker for the sidecar, one obscure schematic requires a 10 amp breaker. So far it is still functional, so it looks like we were giving it too much current.