The reason they are only throwing one way is that they are in DCS mode not Tmcc. The ten second program is for setting ID numbers.
Read the part about disconnecting the power at the right moment to put them in TMCC mode. When they are shipped the can be some tmcc and some DCS.This is probubly why you are going nuts and thinking they are defective.Also this will make the driver red light act goofy having 2 different programmed switches.
I bought 40 of them and i thought 18 of them where bad. I did like you 3 hours of testing, only to find out that you must program each switch to TMCC FIRST.Even though its the last thing in the instructions. All 40 work flawless now except the occasional misthrough when an engine is on the switch
Also the Data driver and the 2500 MUST share the same ground.
Try that also.
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