06-29-2009, 06:26 PM
Most of the better dc throttles have an variable set of dc connections that operate off the knob, a set of connections that are a steady 12-15 volts dc, and finally a set of connections marked 18 volt ac. The first set of connections is for the track and the last 2 sets for accessories. This may seem obvious, but you might have accidentally hooked the tracks up to a set of 15 volt steady dc connections instead of the variable dc. I think in the case of most likely failures of a throttle, whatever the throttle uses to vary the power is most likely to burn open and give you no power to the track at all rather than shorting out to give full power to the track all of the time.