My brother opened the engine and discovered a disconnected wire with no obvious connection point.
Where can we find a wiring diagram for that remote control engine?
Or pictures of the wiring of a working unit?

Thanks,
Ed

Thanks for the instructions.
The four tender screws came out easily, but took some effort to get back in.  Turns out the tender has no wiring other than for the internal speaker.
Still having issues with the remote control - the engine does not respond to it.  Sound doesn't work either (with the tender connected).
With the engine in "continuous run" mode it does stutter while flipping the controller to "off."  I successfully recreated this response several times.
I could never get the engine to react to the "sliding to off" trick with the engine in non "continuous run" mode.
My fear is the sound and radio control portions of the engine are damaged.
I'll have my electrically inclined brother look at it.

Thanks for your help!
   Ed

My father left me his "Radio Control Big Hauler" set and I planned on running it on my G-scale layout on August 28th  in remembrance of his birthday. The remote was easy, I replaced the broken 9 volt connector.   The engine runs continously  (in ON mode); however, the remote has no impact on engine speed.  The lid to the tender's 9 volt space has fallen into the tender and the 9 volt connector is not visible.
1.  I need guidance / instructions on how to open the tender.
2.  It would also be helpful to have the set's operating instructions.


Thanks,
    Ed