A voltmeter will help to determine the problem, especially if it is a lack of contact between sections. A basic one can be had for around $10 from sources like Harbor Freight.
As ACY suggested, cleaning the track and locomotive wheels with a wiper saturated with alcohol is always a good idea.
Happy RRing,
jerry
As ACY suggested, cleaning the track and locomotive wheels with a wiper saturated with alcohol is always a good idea.
Happy RRing,
jerry