I lost power to the switched 12V wire that I tried to use while hard wiring the GPS mount. Multimeter showed 12V with ignition on, then 0V with ignition off. I must have touched something because, later, the same wire , switched, didn't have 12V any more. I went ahead and wired the mount in anyway. using that same switched wire. My owners manuel says there are no fuses. The circuit will reset if the fault is rectified. Could my new multimeter cause this to happen? I'm not so sure that I shorted out the wire.