Also found a switch that was shorting the track. After 30+ years it is running once again.

I am trying to resurrect my train set from my childhood. It probably has not been set up for at least 30 years. It is an O gauge that my father bought in the early '60's. I hooked up the LW transformer and you can hear the engine gets some power when turning on the transformer and the light in the bumper at the end of a siding fluctuates depending on the controller position. If I put a multimeter on the variable output or the constant 18V or 14V posts I get no reading. Again I can hook the constant voltages to the track and the bumper lights up but the train engine just hums a little. Any idea what could be wrong with the transformer? It must be putting out some current but not enough for the multimeter to read. I did put the meter on a battery and it read 1.5V so it is not the meter.