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I picked up one of these little Trinity "dynos" new in the box off of Ebay. I'm running it off a Pro-Peak 20 amp power supply. I have 6 motors I've spun up on it now, all at 5 volts, everything from a 12D to a stocker. All of them worked fine except for one of the three stock motors. This one particular motor starts to spin up, the voltage rises, the amperage continues to rise up to around 15-18 amps, and then it shuts off. There is an error message on the screen that says "output short/start failure". Since it seems it's useless to try and get an answer from Trinity, does anybody have any ideas on why this motor might be doing this? Perhaps a short in the armature wire? It seems to run fine in a truck. Anybody else with any experience with the MHM?