Do you have the same behavior if the engine is running?
I used to have a problem getting my bedroom slide to move ... my work around was to start the engine or to press the switch at the same time as the front slide was in motion.
After I installed a Trick-L-Start the problem has pretty much gone away ... I think voltage on the chassis batteries was the problem ... somehow it was too low to activate a solenoid.
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2012 Buick Enclave
Present At home Home: Oshkosh, WI
former owner 2004 Winnebago Journey 39W
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