Sounds like you have a short on the internals somewhere since the carto works on other
devices. If it is a vv style tesla, you may want to contact the vendor because the electronic chip could be going bad or you may be have a problem with switch contacts. Did you try a another carto on the Tesla... If you do and the same thing happens... Its got to be the internals!! May even consider testing with a new battery in the case something has gone wrong with the current battery your using... check the volts/amps of the battery your using to!!