[Jon Stratis]

Look very closely at the lights on the sidecar. If one is out, there can be some "bleed through" from an adjacent one that makes it look like it's lot, just dim. This can happen especially if the sidecar isn't getting 12V (check with a multimeter at the sidecar power plug!)- It gets enough over the ribbon cable from the crio to light up some, but not all, LEDs. Also, it's possible to get some metal shavings in there that can short out on of the power rails, most often causing the 5V light to go out.

The RSL should do exactly what the LED next to the RSL plug does. If that led isn't coming in at all, then the problem isn't in the RSL.

Check and double check the power wiring into the sidecar. Check and try replacing the ribbon cable from the crio to the sidecar. Try unplugging everything but one item from the sidecar, and see if you can get that one working. Try replacing the sidecar.

Lastly, take pictures/video and post them here so we can look. It's hard to diagnose what you can't see!