The obvious things to check first, are the safety interlocks.
Some slide controllers require the Parking brake is set, and the key is on.
Operate both of them to double check.
Are there lights on the controller...some flash a error code.
If there is no sound at all, check that the controller has 12v...you need a volt meter.
Check the connectors are not loose.
IF 12v is good at the controller, the fuse is fine....
Dan
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2014 40QBH Phaeton DP Cummins 380HP ISL, Freightliner XC, 2019 Jeep Grand Cherokee Trailhawk TOAD
Blue Ox Aventa tow bar, SMI Air Force One -Cave Creek, AZ.
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