MTH Operating Reefer Issue

@Kboruss posted:

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However when I push the unload button all I get is a clicking sound,

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See this OGR thread where OP also says, "When I have it on an operating track and use the unload feature it just clicks and nothing else."  The problem turned out to be a loose/broken connection on the red wire to the lever micro-switch.

Pennsydave's photo showing red wire hi-jacked from above thread:

Later in the thread, another "just clicks" reefer turned out to have a jammed/stuck gear motor mechanism.  Since your mechanism apparently works smoothly with 9V DC applied, the wiring to the microswitch would be a good starting point.  Note that if you are so "lucky" you don't have to do much dis-assembly to access these connections.

And somewhere in the cloud, I posted a DIY How-to on wireless remote activation of the MTH Operating Reefer to activate it anywhere on the layout as opposed to just on an Operating Track Section, UCS, 5-rail activation track, or whatever you call it.  Anyway, I dug up the schematic of this $5 modification.  What's relevant here is the circuit of the Operating Reefer board which shows the relay, lever micro-switch, 9V voltage regulator for gear-motor power, etc.  All the electronic components are inexpensive.  So even if it's not a wiring/connection issue, if you have DIY DNA or sheer-will, I think you can repair your reefer.  To be sure, a voltmeter and soldering-iron will help .

Thank you Stan and that wiring schematic will help greatly to replace the needed components on board. The wires seem good to the micro switch, but not sure about the internals of it. It was working b4 it took a nose dive.