Jaguars always providing voltage

[Kevin Sevcik]

It sounds like one or more of the FETs in the Jaguar's H-Bridge have shorted. There's nothing you can do yourself to make that Jaguar FRC legal again, as the rules prohibit modifying speed controllers. If it's a 2012 Jag, then you could RMA it. If you wanted to repair it for testing purposes, you'd need to crack it open and identify which FETs are shorted and replace them.

If you don't know what FETs are, how to identify shorted ones, and how to replace a surface-mount part, then I'd advise you to cut your losses and give it up for dead.