This may help if it is the switch.. I had a similar issue with another loco.
http://www.blueplastictracks.com/showthr...=Diesel+rc
If it is lot making sound at all not could be the speaker or a wire to the speaker I have had that before too.
http://www.blueplastictracks.com/showthr...=Diesel+rc
If it is lot making sound at all not could be the speaker or a wire to the speaker I have had that before too.