One hot brake?

Best thing you can do is to scrape off a little of the insulation on each wire, close to the brake mechanism, and do a voltmeter reading while someone is stepping on the brake.  I wouldn't just pull the emergency brake pin since that will supply the full voltage and amperage from the battery - which may hide a connection problem that would be evident at a lower voltage.  It would also hide any problem at the Bargman connection.

I soldered all the connections for the marker lights when I put on the new LED's, made sure they had plenty of heat-shrink to protect the connections. The crimp-on connectors have a greater chance of failing over the years due to corrosion. Goose

So I jacked up each side of the pod and spun the wheels while the wifey pressed the brakes on the TV.  The side which was getting really hot stopped instantly.  The side that was cool after driving didn't have any braking ability.  So, that answered the first question of whether there was a brake dragging or a brake not working.  So why was the cold side not responding? Upon closer inspection, I noticed one of the crummy crimp connections was slightly sticking out higher on one side.  I took a pair of channel locks and re-crimped the splicer.  Success.  Full braking on both sides.  I'll have to remember to reset the brake controller on my next drive as the braking will be excessive now that both sides are rockin'!  The first time I did a visual I was looking for something much more obvious (broken wire) oh well at least I know these connectors are as unreliable as I thought they would be... Thanks y'all for your help.